Experiment 41: 4-Methylcyclohexene Introduction: This experiment was a study of protonating a cyclo-alcohol to become a cyclo-ene. In this case 4-methylcyclohexanol was protonated using phosphoric acid to become 4-methylcyclohexene. This demonstrates the loss of an alcohol group by protonation‚ the loss of a proton from the cyclohexane to form an alkene through elimination. This also demonstrates Le Chatelier’s principle‚ by using distillation to remove the product as it is formed the equilibrium
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DEHYDRATION OF 4-METHYLCYCLOHEXANOL PURPOSE Perform an acid-catalyzed dehydration of 4-methylcyclohexanol to produce 4-methycyclohexene. TECHNIQUES • Dehydration of an alcohol • Preparation of an alkene • Distillation • Unsaturation tests THEORY An acid-catalyzed dehydration is a common way to synthesize an alkene from an alcohol. Use of a strong acid like sulfuric or phosphoric acid serves to protonate the alcohol "OH" group‚ forming an H2O molecule that is a much better leaving group
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Compilation of “Dehydration of Methylcyclohexanol” Blog entries: A common Sophomore Organic Chemistry laboratory experiment that has great potential for further research is the acid catalyzed dehydration of simple alcohols. The classic dehydration of 2-methylcyclohexanol experiment that was introduced in Journal of Chemical Education in 1967 Taber(1967)JCE:44‚p620. The rather simple procedure of distilling an alcohol with an aqueous acid has spawned several investigations that have resulted
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In order to first perform the reaction‚ 1.5 mL of 4-methylcyclohexanol was added to a pre-weighed 5mL conical vial. The conical vial was then weighed to find the actual mass of 4-methylcycloheaxanol. Then‚ 0.4mL of 85% phosphoric acid was added to the conical vial using a plastic pipet. Six drops of concentrated sulfuric acid was then added to the vial using a glass pipet. A spin vane was then added before adding the Hickman head‚ water condenser and a drying tube packed with calcium chloride to
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Dehydration of Methylcyclohexanols Balie Zander Date Conducted: March 27‚ 2013 Date Submitted: April 3‚ 2013 Introduction: The purpose of this experiment was to demonstrate the application of Zaitzev’s rule‚ the Evelyn Effect and the occurrence of an E1 mechanism in an alcohol dehydration reaction. Specifically this experiment involved the dehydration of 2-methylcylcohexanol by heating this alcohol in the presence of phosphoric acid and then to based on the results of the gas chromatography
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Dehydration of Methylcyclohexanols 1. Introduction The purpose of this experiment was to carry out the dehydration of 2-methylcyclohexanol or 4-methylcyclohexanol by heating the alcohol in the presence of phosphoric acid. The alcohol was a mixture of cis and trans isomers‚ so it might have exhibited an Evelyn effect. It was also looked at if the products showed the Zaitsev’s rule‚ where in an elimination reaction‚ the most stable alkene was favored‚ which was usually the most substituted one and
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the carbocation‚ removing a beta hydrogen; the electrons from the C-H bond move to make a C-C pi-bond. The general mechanism is displayed by equation (1.0)Equation (1.0) shows a reaction with a primary alcohol. Usually primary alcohols form primary carbocation. However‚ primary carbocations are too unstable to form as intermediates‚ so they can undergo a rearrangement or E2 mechanism. A rearrangement occurs when an alkyl group or a hydrogen on the neighboring carbon of the carbocation shift to delocalize
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distillation column‚ and 7 mL of the distillate was collected. The organic and aqueous layers were separated and the organic layer was dried with anhydrous sodium sulfate. The product was analyzed using GC. III. Conclusion: In this experiment‚ 2-methylcyclohexanol was mixed with phosphoric acid with heat‚ to produce 3 isomers in one solution. This solution was run through a GC to calculate the product distribution. One isomer was such a rarity that it did not register on the GC. 1-methylcyclohexene accounted
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Developing a successful business model without strong control mechanisms will only generate temporary profits. The purpose of control mechanisms in business models is to protect the created values and profit streams from being reduced by competitors‚ partners or strong customers. The last decades have shown a rapid growth in customer power at the same time as new technology and services are being replaced faster. Even though control always has been an important part of the business model
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Description of a Mechanism Group III Group Leader: Maureen Bianca Cobilla Members: Erica Bulloso Catherine Gayle Cancio Tina Rose Capuli B.S in Psychology II-A Table of Contents 1 Description of Mechanism . . . . . . . . . . . . 1 Introduction . . . . . . . . . . . . 1 Initial Presentation . . . . . . . . . . . . 1 Organization of the Description . . . . . . . . . . . . 2 Part by Part Description . . . . . . . . . . . . 3 The Conclusion
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