Cyclohexene Lab Report

The purpose of this experiment was to practice the functional group transformation procedure. The process of the experiment included the dehydration of 2-methylcyclohexanol in the presence of phosphoric acid and heat. The products that were formed from the reaction were 1-methylcyclohexene and 3-methylcyclohexene. The mass of the final product solution was 0.502g with a percent yield of 18.7% and a boiling point range of 84.5-98.5oC.

After the experiment, actually, only 0.862g was precipitated. 0.862g of meso-Stilbene Dibromide is equal to 0.00478mol of meso-Stilbene Dibromide (= 0.862g× 1mol/180.25g). The percent yield calculated in this lab is 95.6% (= (0.00478 mol)/(0.005 mol)×100%). The good yield should be in range of 60% and 65%. Since it is above this range, the yield obtained in this lab was extremely good.

1. Purpose: to clarify the mechanism for the cycloaddition reaction between benzonitrile oxide and an alkene, and to test the regiochemistry of the reaction between benzonitrile oxide and styrene.

Many techniques and skills were developed in this lab. Among them were dehydration, isolation, drying, and distillation. We used all of these techniques to get the product we were looking for. In addition to these experimental techniques we also verified our product via spectroscopy which is a new technique. Using IR spectroscopy we were able to

Introduction The Purpose of the experiment was broken into two parts both having to do with the purification and separation of different compounds and impurities. In part A was the distillation of cyclohexane and in part B it was about taking a 50:50 mixture of dichloromethane and cyclohexane and separating them through fractional distillation. Experimental Refer to Chemistry 2513 Lab Manual Introductory Organic Chemistry Part 1 Fall 2014. Look for this experiment between pages 21-24 Results Observations:

Since the purpose of our experiment was to synthesize Tetraphenylcyclopentadienone from benzyl,dibenzyl ketone,absolute ethanol ,and potassium hydroxyde, we finally got our product at the end which mean we were able to accomplish our purpose. that product is very dangerous for human and very toxics for aquatic organisms.

This experiment is an experiment because of the reactants, and it is has to do with a process called

ratio=(1/2)(.04)(360-330):(1/2)(.19)(430-380) 5. Discussion Based on the GC the reaction yielded both 3-methylcyclohexene and 1-methylcyclohexene. The peak area for both of the latter species were computed and compared. The ratio of products favors 1-methylcyclohexene, highlighting the fact that the more substituted product is favored by this elimination reaction (E1).1

In the separating funnel, a heterogeneous mixture was formed: resulting in an organic layer (top) and a solvent layer (bottom). This effectively allowed the draining of the solvent, in order to isolate the organic layer, the impure ester (1-pentyl ethanoate)

A Chemist Looks at… Seeing Molecules React 13.129 Describe in general terms how chemists can follow the character of a reacting molecule using lasers. Chemists have developed laser technology that handled correctly can allow the experimenter to follow the molecule as it changes. Chemist use multiple types of laser between high and low frequencies. The high frequency excites the molecule then the lower frequency can pulse or probe the molecule. The change of the wavelengths the molecule gives off allows the experimenter to know something is about to change in the molecule.

In this experiment, 1,2-cyclohexene was taken and made it 1,2-cyclohexanediol in two separate reactions. Two products were formed in each respective reaction: cis-1, 2-cyclohexene and trans-1, 2-cyclohexanediol. To figure out which product was formed in each reaction, TLC was used to test the stereochemistry from the products compared to the actual compounds. Each retention factor was compared to the actual product retention factors to see if the reactions had been done properly.

Dispense .5 mL water into the already weighed conical vial, replace cap and face insert on its down side.

The substances used during the experiment have some hazardous drawbacks. Some hazards of working with ethanol are eye and skin irritation and organ toxicity (Ethanol). This compound is combustible. Some hazards of working with sodium hydroxide are severe skin and eye irritation (SODIUM HYDROXIDE). This compound is combustible.

The dye extracts obtained in the preceding subsection will be purified by solvent extraction. In this method, equal volumes of ethyl acetate will be added to the concentrated dye extracts. The mixture will then be shaken for a few minutes and put in a separating funnel. A settled solution will have two layers in which the lower layer is the layer of interest. The layer contains mainly anthocyanins.

The inhibitors were prepared by conducting them on a hot plate at a temperature of about 90℃. Instead using the oven, using hot plate can help to save time and space for the experiment to be conducted as limitation of lab equipment in preparing the chemicals. The individual chemicals, EVA, MCH and Toluene are measured separately of its respective volume and weightage in accordance to the manipulated percentage composition. The unit for the EVA is grams of mass while MCH is in mL and toluene and butanol in mL. The total volume of inhibitor used is 0.4g. Thus, for example, if the percentage composition of sample prepared is 50% EVA, 10% MCH and 40% Toluene, then 0.2 g EVA is measured using a mass balance, 0.04 mL of MCH is measured using a micropipette and 0.16 mL of Toluene is measured using a micropipette.