organic chemistry
Name Naza Moore
ID# 24120389
Lab# 2
Lab instructors Alecia Palmer and Donald Burke
Course Instructor Maureen Wilson
Lab Title Preparation of cyclohexene from cyclohexanol
Aim Preparation of an Alkene by dehydration of an alcohol in the presence of a catalyst. Calculate the percentage recovery of products. Test for purity and identification of products.
Abstract
Cyclohexene and cyclohexanol are both colourless aromatic compounds. The major difference between the two is the presence of the hydroxyl group present in cyclohexanol. This hydroxyl group can be removed by a process known as dehydration which results in the production of cyclohexene at the end of the dehydration process in the presence of a catalyst which, in this case, was 85% phosphoric acid. Dehydration can be defined as any chemical reaction which involves the removal of a water molecule from a substance. During the experiment, anhydrous calcium chloride was provided as a drying agent to ensure that pure cyclohexene was obtained, calcium chloride works by binding itself to the water molecule thus removing it in the process. After the dehydrating process was completed, a few tests using Potassium Permanganate solution and Bromine which were purple and Reddish-Orange respectively was conducted. The tests showed a positive result which indicated that the product was indeed pure cyclohexene. As a result of this, it was concluded that the activity was indeed a success as cyclohexene was produces from cyclohexanol.
Introduction
On a general level, alkenes can be formed from the dehydration of an alcohol in the presence of a strong acid. The acid simply acts as a catalyst and as such increases the reaction time but while doing so does not affect the overall stoichiometry. The usual mole ratio of such reaction is therefore 1:1 which means that the theoretical yield of Alkene in mole is equal to the amount of alcohol used in the reaction. Below are the reaction and the overall
ID# 24120389
Lab# 2
Lab instructors Alecia Palmer and Donald Burke
Course Instructor Maureen Wilson
Lab Title Preparation of cyclohexene from cyclohexanol
Aim Preparation of an Alkene by dehydration of an alcohol in the presence of a catalyst. Calculate the percentage recovery of products. Test for purity and identification of products.
Abstract
Cyclohexene and cyclohexanol are both colourless aromatic compounds. The major difference between the two is the presence of the hydroxyl group present in cyclohexanol. This hydroxyl group can be removed by a process known as dehydration which results in the production of cyclohexene at the end of the dehydration process in the presence of a catalyst which, in this case, was 85% phosphoric acid. Dehydration can be defined as any chemical reaction which involves the removal of a water molecule from a substance. During the experiment, anhydrous calcium chloride was provided as a drying agent to ensure that pure cyclohexene was obtained, calcium chloride works by binding itself to the water molecule thus removing it in the process. After the dehydrating process was completed, a few tests using Potassium Permanganate solution and Bromine which were purple and Reddish-Orange respectively was conducted. The tests showed a positive result which indicated that the product was indeed pure cyclohexene. As a result of this, it was concluded that the activity was indeed a success as cyclohexene was produces from cyclohexanol.
Introduction
On a general level, alkenes can be formed from the dehydration of an alcohol in the presence of a strong acid. The acid simply acts as a catalyst and as such increases the reaction time but while doing so does not affect the overall stoichiometry. The usual mole ratio of such reaction is therefore 1:1 which means that the theoretical yield of Alkene in mole is equal to the amount of alcohol used in the reaction. Below are the reaction and the overall