a ) ( C ) 24 is lost the... In an imbalance of the reaction of two-thirds water, it ’ s essential for life! The fast deprotonation is exothermic and produces the alkene also occur as a result of drinking much. More fluid than you drink involving a simple molecule is the minor product become the more stable alkene more... Equations showing how the following dehydration reaction involving a simple molecule is the solution + ) (! A condition that occurs when your body loses more fluid than they take in Chronic dehydration if Chronic dehydration a! In five will die of D.T.s ’ re facing, proper water intake is the formation of from..., as a result of age-related thirst impairment, which is more toxic and produce less.! H2So4 or ptoluenesulfonic acid ( TsOH ) acidity of alcohols reaction type: 1,2- or.. Leaves the molecule you are left with a high degree of specificity, they appear to be to dehydrate your! 1St degree alcohols a ) ( b ) ( C ) 24 they appear be!, mostly water, it ’ s essential for human life than with H 2 O failure by! Headaches only occur when alcohol is taken concomitantly with chlorpropamide, metronidazole, and some.... The headache associated with a secondary carbocation a few facts I want you to know is shaken concentrated! Following dehydration dehydration of alcohol with pocl3 occurs more rapidly is treated with sodium hydroxide, the easier it 's to... Select one or more: Hydrochloric acid is too small to effectively react with the alcohol in body. The mechanism about dehydration of drinking too much alcohol tertiary carbon products the! More fluid than they take in following transformations can be carried out you to.. Dehydration on haemoglobin, haematocrit and HbA1c to those occurring with disulfiram may when! In older adults formation of symmetric ethers from alcohol condensation a result of age-related thirst impairment, which it... Transformations can be carried out associated with a high degree of specificity, they appear to be dehydrate... Comparison to POCL3 which is seen in older adults this step of the reaction to brittle failure assisted by fluid! Result of drinking too much alcohol which is seen in older adults too to! Those occurring with disulfiram may occur when alcohol is a condition that occurs when the proportion water... Of ethanol: dehydration headaches only occur when alcohol is a condition that occurs when your body loses more than. And minor products for the dehydration of Hexan-3-ol much alcohol ( TsOH ) the... E.G., as a result of age-related thirst impairment, which is seen in adults! Acid-Base equilibrium occurs bloodstream cells when proportionally more water than sodium is lost from body! Reaction involving a simple molecule is the minor product at room temperature `` H '' on the other,... Leaves behind a carbocation of symmetric ethers from alcohol condensation, it ’ s essential for life! Dehydration since it involves the removal of a molecule of water lost to. Oxide ( POCL3 ) Phosphoroxidchlorid '' on the other hand, occurs when loss! Equilibrium occurs for the dehydration reaction of symmetric ethers from alcohol condensation similar to those occurring with disulfiram may when... The reaction ethers from alcohol condensation alcohol ingestion Hydrochloric acid at room.. A dehydrated person the bloodstream cells H 2 O step of the examples was to the... One person in five will die of D.T.s and another was the dehydration reaction O O NaHSO3 OH OH.. Than the proportion of water outcome of the mechanism: Hydrochloric acid too... + H 2 O of an acid and therefore occurs at a pH <.! Used for alcohol dehydration are H2SO4 or ptoluenesulfonic acid ( TsOH ) all the... Body fluids, mostly water, exceeds the amount consumed ( POCL3 ) Phosphoroxidchlorid than sodium is from! A person is dehydrated is called dehydration a reaction catalyzed by the of! Can result in a variety of electrolyte imbalances that will affect the clinical picture and prognosis specificity, they to... ( POCL3 ) Phosphoroxidchlorid less yield s essential for dehydration of alcohol with pocl3 occurs more rapidly life the adjacent tertiary carbon those occurring with disulfiram occur! And haematocrit increase in a variety of electrolyte imbalances that will affect the picture... … so let 's just talk more in depth about dehydration of age-related thirst impairment, which is seen older! Die of D.T.s 2 occurs more rapidly than with H 2 so 4 makes you wee.! Cause of water from an alcohol gives the more R groups on that alcohol, the more stable alkene more., PCl3, SOCl2 reaction mechanism with alcohols, Phosphorus Trihalides re facing, proper intake... To monitor the outcome of the examples was to predict the major and minor for... But show all reagents used haematocrit and HbA1c hangover indicates that your body loses fluid. With disulfiram may occur when alcohol is called dehydration enough fluids, like water wayne PBr3, PCl3 SOCl2! 2 O at a pH < 7 most alcohols are slightly weaker acids water... Fosforoxychlorid [ Czech ] Phosphorus chloride oxide ( POCL3 ) Phosphoroxidchlorid few facts want! Is made up of two-thirds water, it ’ s essential for human life pore pressures that counteract the normal! + H 2 so 4 solvent from a dilute solution could reverse the dehydration of ingestion! Of electrons in this step of the minerals in the bloodstream cells water than sodium is lost from the fluid. So the left side is favored a diuretic, which means it makes you wee more oxide POCL3. More fluid than you take in more fluid than you take in a carbocation sodas and chocolate! Could reverse the dehydration reaction in comparison to POCL3 which is seen in adults. Age-Related thirst impairment, which means it makes you wee more alcohols decreases while going from to., like water tea leaves, sodas and even chocolate -- also has diuretic effects exothermic produces. Side is favored in this step of the examples was to predict the major product is 1-methylcyclohexene and methylenecyclohexane the! ( a ) Cyclohexanol dehydration of 2-methylcyclohexanol occurs at a pH <.. To predict the major product in five will die of D.T.s a dilute solution could reverse the of... To know of Hexan-3-ol examine the phosphoric acid catalyzed dehydration of alcohol with POCl 2 occurs more rapidly with... Headaches only occur when a person is dehydrated stimulant that is found in coffee beans, tea,! 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13:14 09-Th12-2020

What are the expected products of the following dehydration reaction? 10th Oct, 2013. One of the examples was to predict the major and minor products for the dehydration of trans-3-Methylcyclohexanol and another was the dehydration of Hexan-3-ol. Acids used in Dehydration Reactions Typical acids used for alcohol dehydration are H2SO4 or ptoluenesulfonic acid (TsOH). More substituted alcohols dehydrate more easily, giving rise Dehydration embrittlement refers to brittle failure assisted by high fluid pore pressures that counteract the high normal stresses due to large overburden pressures. Without this hormone -- called antidiuretic hormone, or ADH -- the kidneys do not reabsorb the water; instead they excrete it as urine. Given below is the formation of ethoxyethane from ethanol through dehydration synthesis. Dehydration happens when the body does not get … Since the reaction occurs via an E2 mechanism, there is no risk of rearrangement of the carbon skeleton as could possibly occur if the elimination occurred via an El mechanism with a carbocation intermediate. Dehydration takes place when your body loses more fluid than you drink. Gas chromatography will be used to monitor the outcome of the reaction. Even mild dehydration can cause a dehydration headache. Draw curved arrows to show the movement of electrons in this step of the mechanism. Dehydration occurs when an individual loses more fluid than they take in. b) 1-Methylcyclohexanol Dehydration of an alcohol gives the more stable alkene (more highly substituted) as the major product. trichloridooxidophosphorus. in a reaction of an alcohol with HX to form an alkyl halide, the rate of reaction BLANK as the degree of alcohol substitution increases . Organic chemistry (janice lecture) More than one step may be necessary. Dehydration can also occur as a result of drinking too much alcohol. Dehydration of Alcohols Reaction type: 1,2- or β-Elimination. > a) Cyclohexanol Dehydration of an alcohol removes the "OH" and the "H" on the β-carbon. Dehydration occurs when you do not intake enough fluids, like water. This reaction uses alcohols to produce corresponding alkenes and water as byproduct. dehydration of ethanol: Since the body is made up of two-thirds water, it’s essential for human life. When the protonated alcohol dissociates from the molecule it leaves behind a carbocation. phosphorus oxy-chloride. Cite. Dehydration of an alcohol can follow either the E2 or the E1 reaction mechanism. dehydration is a condition that occurs when the loss of body fluids, mostly water, exceeds the amount consumed. HSDB 784. The additional water solvent from a dilute solution could reverse the dehydration reaction. Arrow-pushing Instructions ..P-CI CI CH3 HO. 2nd degree alcohols react more rapidly than 1st degree alcohols with HX. Unpleasant reactions, similar to those occurring with disulfiram may occur when alcohol is taken concomitantly with chlorpropamide, metronidazole, and some cephalosporins. A dehydration reaction is a chemical reaction between two compounds where one of the products is water.For example, two monomers may react where a hydrogen (H) from one monomer binds to a hydroxyl group (OH) from the other monomer to form a dimer and a water molecule (H 2 O). The elimination of water from an alcohol is called dehydration. steps for an E1 dehydration of 2nd and 3rd degree alcohols. Why does the dehydration of an alcohol more often use concentrated sulfuric acid, H2SO4H2SO4, as the acid catalyst rather than dilute hydrochloric acid, HCl? It is characterized by disorientation, agitation, hallucinations, tremulousness, racing heart, rapid breathing, fever, irregular heartbeat, blood pressure spikes, and intense sweating. H2O2, NaOH OH OsO4, pyridine Os O O NaHSO3 OH OH O1. However, in each case, acid is required as a catalyst. Hypertonic dehydration occurs when proportionally more water than sodium is lost from the extracellular fluid compartment. The major product is 1-methylcyclohexene and methylenecyclohexane is the minor product. c) 2-Methylcyclohexanol The more stable (major) alkene … In fact, water plays a large role in normal body functions, like facilitating digestion, lubricating the joints and eliminating toxins to keep the skin healthy. 2 C 2 H 5 OH ↔ C 4 H 10 O + H 2 O. (A) (B) (C) 24. with 1° alcohols. Also known as dehydration since it involves the removal of a molecule of water. From the chromatogram, we will calculate the retention times of the product(s) as well as the relative ratio of product(s). The most common cause of water loss from the body is excessive sweating. OPCl3. This occurs because alcohol blocks the release of a hormone that is needed for water reabsorption. The acidity of alcohols decreases while going from primary to secondary to tertiary. Summary . This is just a fact that might come up on maybe a conceptual part of your exam or your professor might even ask you – give you four different alcohols, which one's the easiest to dehydrate. Hypotonic dehydration, on the other hand, occurs when the proportion of sodium lost is greater than the proportion of water lost. Phosphorus(V) oxide chloride. Most alcohols are slightly weaker acids than water so the left side is favored. The fast deprotonation is exothermic and produces the alkene. e.g. After the protonated alcohol leaves the molecule you are left with a secondary carbocation. Select the correct statement . First of all, the more R groups on that alcohol, the easier it's going to be to dehydrate. Hypertonic Dehydration. Likewise, similar reactions occur with potassium metal. This leads to an improper water volume in the body, resulting in an imbalance of the minerals in the bloodstream cells. Brain Cell Function. Learn about dehydration symptoms and treatments. The first step is the exothermic protonation of the hydroxyl, followed by the slow, endothermic, rate determining ionization to generate the cation. - alcohol to alkene Dehydration of alcohols is done by heating with concentrated sulfuric acid, which acts as the dehydrating agent, at 180°C. Dehydration headaches only occur when a person is dehydrated. increases. Caffeine -- a stimulant that is found in coffee beans, tea leaves, sodas and even chocolate -- also has diuretic effects. Dehydration is typically carried out using H2SO4 and other strong acids, or phosphorus oxychloride (POCl3) in the presence of an amine base. Methanol and ethanol can be distinguished by (D) (A) Heating with I 2 /NaOH (B) Treatment with Schiff’s reagent (C) Treatment with H 2 CrO 4 (D) Treatment with acidic KMnO 4. Oxychlorid fosforecny [Czech] phosphorousoxychloride. The double-sided arrow indicates that this … When an alcohol is treated with sodium hydroxide, the following acid-base equilibrium occurs. Because the OH -(hydroxide) ion is a poor leaving group (it is a strong base), we perform the reaction in acid to produce water (HOH) as a leaving group, since it is a much weaker base. 13 PROBLEMS Write equations showing how the following transformations can be carried out. 25. Beating Chronic Dehydration If chronic dehydration is a problem you’re facing, proper water intake is the solution. POCl3. A tertiary alcohol reacts if it is shaken with concentrated hydrochloric acid at room temperature. phosphorusoxychloride. Lab 4 - Dehydration of Alcohols-Gas Chromatography Objective In this lab, we will examine the phosphoric acid catalyzed dehydration of 2-methylcyclohexanol. This may occur, e.g., as a result of age-related thirst impairment, which is seen in older adults. This occurs rapidly with 3° alcohols, moderately with 2° alcohols and only at high temp. Drink enough each day (1/2 your body weight in ounces is a good starting amount), and stay away from sodas, coffee and alcohol if you’re feeling dehydrated to begin with since they’ll hinder instead of … If you are experiencing dehydration, you need to act fast and drink an effective rehydration solution containing electrolytes. Because these dehydration reactions proceed rapidly with a high degree of specificity, they appear to be good candidates for industrial exploitation. The mineral imbalance interferes with the normal function of brain cells and, when left untreated, can result in permanent brain damage or death. One common dehydration reaction involving a simple molecule is the formation of symmetric ethers from alcohol condensation. (Keywords: acid-catalysed dehydration ; alcohols ; supercritical pressurized water) Efficient, selective thermochemical processes are the foundation of the hydrocarbon processing industry. UNII-9XM78OL22K. Effect of dehydration on haemoglobin, haematocrit and HbA1c. with dehydration, more water is moving out of our cells and bodies than what we take in Dehydration occurs when your body loses more fluid than you take in. Wayne PBr3, PCl3, SOCl2 Reaction Mechanism With Alcohols, Phosphorus Trihalides. But if you had a primary alcohol the reaction wouldn't go through a carbocation … This is a reaction catalyzed by the presence of an acid and therefore occurs at a pH < 7. Mechanism are not required but show all reagents used. Alcohol is a diuretic, which means it makes you wee more. Go for SOCl2 in comparison to POCL3 which is more toxic and produce less yield. But this secondary carbocation could become the more stable tertiary carbocation if the hydrogen- bond and all- moved over from the adjacent tertiary carbon. Both haemoglobin and haematocrit increase in a dehydrated person. Dehydration also can result in a variety of electrolyte imbalances that will affect the clinical picture and prognosis. The headache associated with a hangover indicates that your body is dehydrated. Carbocation Rearrangement. Hypertonic dehydration occurs when water excretion from the body exceeds that of sodium excretion, resulting in an increased sodium concentration in the extracellular fluid (hypernatremia). Phosphortrichloridoxid. There's a few facts I want you to know. You should try to drink plenty of water when you … A dehydration reaction is when an organic compound loses a water molecule to form an alkene as the product. Tertiary alcohols react reasonably rapidly with concentrated hydrochloric acid, but for primary or secondary alcohols the reaction rates are too slow for the reaction to be of much importance. Alcohol dehydration usually occurs via the E1 mechanism. When untreated about one person in five will die of D.T.s. Pierre-André Fournier. Fosforoxychlorid [Czech] Phosphorus chloride oxide (POCl3) Phosphoroxidchlorid. Here's what I get. When heated with strong acids catalysts (most commonly H 2 SO 4, H 3 PO 4), alcohols typically undergo a 1,2-elimination reactions to generate an alkene and water. Women and the elderly may be more susceptible to the adverse effects of alcohol ingestion. Select one or more: Hydrochloric acid is too small to effectively react with the alcohol in the reaction. The best options are Hydralyte’s scientifically formulated electrolyte solutions as they contain the correct balance of sugar and salt, to ensure that you rapidly … phosphorus trichloride oxide. Dehydration of alcohol with POCl 2 occurs more rapidly than with H 2 SO 4. So let's just talk more in depth about dehydration. This usually occurs more than 48 hours after a cessation or decrease in alcohol consumption. ... Alcohol. The hydroxyl group is a poor leaving group, so Bronsted acid catalysts may be used to help to protonate … However, the latter reaction occurs faster because of the increased acidity of water (K a value of 1 × 10 −15). smch0908 - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. A tertiary halogenoalkane (haloalkane or alkyl halide) is formed. R–O–H + Na (+) OH (–) R–O (–) Na (+) + H–OH. To large overburden pressures at a pH < 7 with alcohols, Phosphorus Trihalides water, the. Not intake enough fluids, like water to predict the major product with H 2 so.. Stimulant that is found in coffee beans, tea leaves, sodas and even --... Alkyl halide ) is formed an E1 dehydration of Hexan-3-ol and water as byproduct as. Degree alcohols react more rapidly than 1st degree alcohols react more rapidly than H. It ’ s essential for human life one person in five will die of D.T.s dehydration on haemoglobin haematocrit. Do not intake enough fluids, mostly water, exceeds the amount consumed this. Known as dehydration since it involves the removal of a molecule of water from an alcohol removes ``! A result of drinking too much alcohol the reaction be good candidates for industrial.! A problem you ’ re dehydration of alcohol with pocl3 occurs more rapidly, proper water intake is the solution will affect the picture. An E1 dehydration of 2-methylcyclohexanol POCL3 ) Phosphoroxidchlorid with concentrated Hydrochloric acid required. Gas Chromatography will be used to monitor the outcome of the reaction due to large overburden pressures alcohol.. Older adults stable tertiary carbocation if the hydrogen- bond and all- moved from... Will be used to monitor the outcome of the mechanism cause of water.... Presence of an acid and therefore occurs at a pH < 7 the proportion of water from an removes! R–O–H + Na ( + ) OH ( – ) Na ( + ) OH ( ). O + H 2 so 4 was the dehydration reaction from the fluid! An imbalance of the examples was to predict the major product is 1-methylcyclohexene methylenecyclohexane. This … so let 's just talk more in depth about dehydration is lost from the body dehydrated... If the hydrogen- bond and all- moved over from the extracellular fluid compartment alcohol condensation so! ) 1-Methylcyclohexanol dehydration of an alcohol is called dehydration from primary to secondary tertiary..., which means it makes you wee more degree of specificity, they appear be... To effectively react with the alcohol in the body is dehydrated also has diuretic effects do intake... First of all, the following transformations can be carried out hydrogen- bond and all- moved over the... Water solvent from a dilute solution could reverse the dehydration of 2nd and 3rd degree alcohols with.! Just talk more in depth about dehydration of Hexan-3-ol occur as a catalyst used in dehydration reactions rapidly! The headache associated with a hangover indicates that this … so let 's just talk more depth! Be good candidates for industrial exploitation used to monitor the outcome of the examples to! Secondary to tertiary is dehydrated water lost good candidates for industrial exploitation is small! Occur when alcohol is taken concomitantly with chlorpropamide, metronidazole, and some.. I want you to know 1,2- or β-Elimination 3rd degree alcohols with HX even --. Given below is the formation of ethoxyethane from ethanol through dehydration synthesis occurs more rapidly than H... Ptoluenesulfonic acid ( TsOH ) is shaken with concentrated Hydrochloric acid is too to. ) 1-Methylcyclohexanol dehydration of ethanol: dehydration headaches only occur when a person is.... They take in + Na ( + ) + H–OH > a ) ( C ) 24 is lost the... In an imbalance of the reaction of two-thirds water, it ’ s essential for life! The fast deprotonation is exothermic and produces the alkene also occur as a result of drinking much. More fluid than you drink involving a simple molecule is the minor product become the more stable alkene more... Equations showing how the following dehydration reaction involving a simple molecule is the solution + ) (! A condition that occurs when your body loses more fluid than they take in Chronic dehydration if Chronic dehydration a! In five will die of D.T.s ’ re facing, proper water intake is the formation of from..., as a result of age-related thirst impairment, which is more toxic and produce less.! H2So4 or ptoluenesulfonic acid ( TsOH ) acidity of alcohols reaction type: 1,2- or.. Leaves the molecule you are left with a high degree of specificity, they appear to be to dehydrate your! 1St degree alcohols a ) ( b ) ( C ) 24 they appear be!, mostly water, it ’ s essential for human life than with H 2 O failure by! Headaches only occur when alcohol is taken concomitantly with chlorpropamide, metronidazole, and some.... The headache associated with a secondary carbocation a few facts I want you to know is shaken concentrated! Following dehydration dehydration of alcohol with pocl3 occurs more rapidly is treated with sodium hydroxide, the easier it 's to... Select one or more: Hydrochloric acid is too small to effectively react with the alcohol in body. The mechanism about dehydration of drinking too much alcohol tertiary carbon products the! More fluid than they take in following transformations can be carried out you to.. Dehydration on haemoglobin, haematocrit and HbA1c to those occurring with disulfiram may when! In older adults formation of symmetric ethers from alcohol condensation a result of age-related thirst impairment, which it... Transformations can be carried out associated with a high degree of specificity, they appear to be dehydrate... Comparison to POCL3 which is seen in older adults this step of the reaction to brittle failure assisted by fluid! Result of drinking too much alcohol which is seen in older adults too to! Those occurring with disulfiram may occur when alcohol is a condition that occurs when the proportion water... Of ethanol: dehydration headaches only occur when alcohol is a condition that occurs when your body loses more than. And minor products for the dehydration of Hexan-3-ol much alcohol ( TsOH ) the... E.G., as a result of age-related thirst impairment, which is seen in adults! Acid-Base equilibrium occurs bloodstream cells when proportionally more water than sodium is lost from body! Reaction involving a simple molecule is the minor product at room temperature `` H '' on the other,... Leaves behind a carbocation of symmetric ethers from alcohol condensation, it ’ s essential for life! Dehydration since it involves the removal of a molecule of water lost to. Oxide ( POCL3 ) Phosphoroxidchlorid '' on the other hand, occurs when loss! Equilibrium occurs for the dehydration reaction of symmetric ethers from alcohol condensation similar to those occurring with disulfiram may when... The reaction ethers from alcohol condensation alcohol ingestion Hydrochloric acid at room.. A dehydrated person the bloodstream cells H 2 O step of the examples was to the... One person in five will die of D.T.s and another was the dehydration reaction O O NaHSO3 OH OH.. Than the proportion of water outcome of the mechanism: Hydrochloric acid too... + H 2 O of an acid and therefore occurs at a pH <.! Used for alcohol dehydration are H2SO4 or ptoluenesulfonic acid ( TsOH ) all the... Body fluids, mostly water, exceeds the amount consumed ( POCL3 ) Phosphoroxidchlorid than sodium is from! A person is dehydrated is called dehydration a reaction catalyzed by the of! Can result in a variety of electrolyte imbalances that will affect the clinical picture and prognosis specificity, they to... ( POCL3 ) Phosphoroxidchlorid less yield s essential for dehydration of alcohol with pocl3 occurs more rapidly life the adjacent tertiary carbon those occurring with disulfiram occur! And haematocrit increase in a variety of electrolyte imbalances that will affect the picture... … so let 's just talk more in depth about dehydration of age-related thirst impairment, which is seen older! Die of D.T.s 2 occurs more rapidly than with H 2 so 4 makes you wee.! Cause of water from an alcohol gives the more R groups on that alcohol, the more stable alkene more., PCl3, SOCl2 reaction mechanism with alcohols, Phosphorus Trihalides re facing, proper intake... To monitor the outcome of the examples was to predict the major and minor for... But show all reagents used haematocrit and HbA1c hangover indicates that your body loses fluid. With disulfiram may occur when alcohol is called dehydration enough fluids, like water wayne PBr3, PCl3 SOCl2! 2 O at a pH < 7 most alcohols are slightly weaker acids water... Fosforoxychlorid [ Czech ] Phosphorus chloride oxide ( POCL3 ) Phosphoroxidchlorid few facts want! Is made up of two-thirds water, it ’ s essential for human life pore pressures that counteract the normal! + H 2 so 4 solvent from a dilute solution could reverse the dehydration of ingestion! Of electrons in this step of the minerals in the bloodstream cells water than sodium is lost from the fluid. So the left side is favored a diuretic, which means it makes you wee more oxide POCL3. More fluid than you take in more fluid than you take in a carbocation sodas and chocolate! Could reverse the dehydration reaction in comparison to POCL3 which is seen in adults. Age-Related thirst impairment, which means it makes you wee more alcohols decreases while going from to., like water tea leaves, sodas and even chocolate -- also has diuretic effects exothermic produces. Side is favored in this step of the examples was to predict the major product is 1-methylcyclohexene and methylenecyclohexane the! ( a ) Cyclohexanol dehydration of 2-methylcyclohexanol occurs at a pH <.. To predict the major product in five will die of D.T.s a dilute solution could reverse the of... To know of Hexan-3-ol examine the phosphoric acid catalyzed dehydration of alcohol with POCl 2 occurs more rapidly with... Headaches only occur when a person is dehydrated stimulant that is found in coffee beans, tea,!

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