Experiment 2 - Preparation of Cyclohexene

Visayas State University, Baybay, Leyte
CHEM126 Organic Chemistry II
Laboratory Report

Name :   Mark Ryan R. Tripole Date Performed : 11/27/2014
Course/Yr :   BS Chemistry II Date Submitted : 12/09/2014
Group No :   2 Score

Experiment No. 2
Preparation of Cyclohexene

I. Introduction

Looking at it from the perspective of study, alkene chemistry is one which is quite broad because of the many reactions that the particular class of organic compound undergoes. The reactions are always reversible in the sense that if one were to try to convert a particular alkene into, let’s say, an alcohol through the process of hydrolysis, then the reverse could be achieved by the dehydration of the alcohol back into the parent alkene.
The main objective of this experiment was to observe the laboratory procedure for the synthesis of cyclohexene from cyclohexanol, which, as already mentioned before, is though the dehydration of the parent alcohol to introduce the unsaturation. This dehydration, or removal of water, is characteristic of a class of reactions known as Elimination reactions. The classification and idea is somewhat the same as that of Substitution reactions, but the key difference lies in the fact that in elimination reactions, connections are being broken and those molecules that have broken away are completely removed or “eliminated”. This introduces the other objective, which was to gain a functional understanding of these Elimination reactions and the mechanisms that makes them happen. Though there are two main classifications of Elimination reactions, namely the E1 and the E2, there will be emphasis only on the E1 because that is the main mechanism through which the dehydration of the cyclohexanol actually takes place. Further elaboration on the respective mechanisms will be shown in the succeeding sections.

II. Results

The experimental procedure was all about the synthesis of cyclohexene from the...