Experiment 2: Dehydration of an Alcohol: Distillation and Gas Chromatography
Preparation of Methylcyclohexenes
The basic purpose of this experiment is to carry out the dehydration of an alcohol and isolate the reaction products by distillation. Gas Chromatography will be utilized to analyze...
The goals in this lab were to have a reaction occur with 4-methylcyclohexanol and an acid catalyst to form our product of 4-methylcyclohexene via an E1 reaction. This reaction is accomplished by removing the –OH group on 4-methylcyclohexanol...
Preparation of 4-Methylcyclohexene
Background Alcohol dehydration is an acid-catalyzed reaction performed by strong, concentrated mineral acids such as sulfuric and phosphoric acids. The acid protonates the alcoholic hydroxyl group, permitting it to dissociate as water. Loss of a proton from the intermediate...
DEHYDRATION OF 4-METHYLCYCLOHEXANOL
Perform an acid-catalyzed dehydration of 4-methylcyclohexanol to produce
• Dehydration of an alcohol
• Preparation of an alkene
• Unsaturation tests
An acid-catalyzed dehydration is a common way...
extraction, crystallization and melting point determination, preparations of organic compound and separation of mixtures.
Students are REQUIRED to read and understand the various techniques that will be covered in the laboratory sessions from the textbook.
| Techniques | Page |
1 | Laboratory...
Dehydration of 2-Methylcyclohexanol
February 10, 2013
This experiment was done to demonstrate the practical use of dehydration reactions and produce three different products. Dehydration reactions are reactions that involve the leaving of an “-OH” or “-H” group resulting in the formation...
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...
Experiment 9-Dehydration of 2-methylcyclohexanol
Lab Day and Time____________________________________________________________ ...
Experiment 41: 4-Methylcyclohexene
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...
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 for 82.9% of...
with an acid to produce alkenes as a product. The product formed is separated through distillation. Because more than one alkene product can result from the reaction, Gas Chromatography is used to analyze the composition of the product mixture. IR spectrometry is also carried out to confirm the product...
To carry out the dehydration of 2-methylcyclohexanol and study the orientation of C=C
in the final alkene products. Saytzev°s rule will be tested.
Alcohols can be dehydrated by using an acid such as sulfuric or phosphoric acid. Water
will be eliminated from the molecule and a C=C...
Dehydration of Methylcyclohexanols
Date Conducted: March 27, 2013
Date Submitted: April 3, 2013
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...
1. Give the major products from each of the following reactions, clearly showing regiochemistry
and stereochemistry whenever applicable
2. Draw structures corresponding to the following names:
of alkanes Describe reactions of alkanes Propose a mechanism on free radicals substitution
6. Describe the preparation and reactions of alkenes.
7. Propose mechanism on preparation; dehydration of
8. Define carbocation, electrophile and Markovnikov’s Rule. 9. Propose mechanism...
Dehydration of Alchohols
Alcohols may be dehydrated under acid_catalyzed conditions to form alkenes. In the presence of Bronsted acids, such as sulfuric and phosphoric acid, dehydrations involve the initial protonation of the hydroxyl group, converting it to an excellent leaving group. Loss of water...
the absence of light to
form the corresponding dibromide compound. This reaction can be followed by the
disappearance of the brown bromine colour from the reaction medium, as long as the
alkene is in excess.
Alkanes on the other hand show no appreciable reaction under these conditions. If
product of a β-elimination reaction is the most stable alkene .Acid-Catalyzed Dehydration is the elimination of a molecule of water from adjacent carbon atoms. An alcohol can be converted to an alkene by dehydration, which is often brought on by heating the alcohol with either 85% phosphoric acid...
ORGANIC CHEMISTRY LABORATORY EXPERIMENTS
ORGANIC CHEMISTRY LABORATORY
WRITTEN, COMPILED AND EDITED
TABLE OF CONTENTS
SYNTHESIS OF ASPIRIN 1
MELTING POINT AND CRYSTALLIZATION 2
have also been obtained from other sources. Terpenoids are volatile substances which give plants and flowers their fragrance. They occur widely in the leaves and fruits of higher plants, conifers, citrus and eucalyptus. The term ‘terpene’ was given to the compounds isolated from terpentine, a volatile...