Diels Alder Reaction Lab Report

The hypothesis that was provided to this question was If Phenol Red is add with the other chemicals then a color change will occur. Methods: To begin the lab 40 mL of Phenol red were obtained in a beaker, and 40 mL of water were obtained in a separate beaker. Next one plastic baggie was

Test such as Bromination, IR spectroscopy, refractive index, and measures physical properties confirmed that the product collected was the desired product, cyclohexene. A bromination

In this lab, the objective was to examine the effect of an SN2 reaction using a phase transfer catalyst in dichloromethane. We isolated the product of the phase transfer reaction by using liquid chromatography and then prepared TLC plates to see which of the five vials collected contained the isolated product and an IR spectrum was then obtained. The reaction in this lab was an example of an SN2 reaction. SN2 is a nucleophilic substitution reaction where one bond is broken and one bond is formed in one step.

A control was used to compare the reactant and the product, showing a clear appearance that would indicate an alkene being present. Bromine was added to the reactant 4-methylcyclohexanol, and a reddish-brown color appeared, indicating that no reaction took place. Bromine was then added to the product 4-methylcyclohexene, and the clear appearance of the product remained, concluding that an alkene is indeed present. Discussion Given the results obtained post-experiment, the percent yield was calculated to be about 35.5%, which may suggest that either product was lost at some point during the experiment, or side product was formed.

which ultimately the reaction depended upon on the

In beaker with the formed CuSO4 from Reaction 4, a piece of aluminum wire, which was bent into a circular shape, was placed in the beaker, and completely submerged in the solution. To this beaker a small stir bar was added along with 5 drops of 6 M HCl to start the reaction. This beaker was place onto the hot plate, covered with a watch glass, and the stir setting on the hot plate was turned on so that the stir bar moved the piece of aluminum wire around and hit it repeatedly. The wire began to have copper form on it and the stir bar hitting the wire would knock off the formed copper. Before the beginning of the next step the reaction had to be completed.

The two solvents were added to the funnel, and the funnel was capped and the stopcock was closed to avoid spilling of solution. The funnel was then turned over several times for several minutes to let the aqueous and organic layer make contact by increasing surface area of reaction. The stopcock was periodically opened to relieve the air pressure that built up due to gaseous products formed by the reactions. In the first step, HCl was added to the ethyl acetate, which protonated the organic base, forming the base’s conjugate acid, which was polar and hence soluble in the aqueous solution. The aqueous layer was drained, and NaOH was added to neutralize the solution, and deprotonate the conjugate acid to reform the original base, which, as an organic base, was mostly insoluble in an aqueous solution, and precipitated out.

Concepts learned include molar ratio calculation, and ester constituents (carboxylate acid and alcohol). In addition, the use of a cold finger condenser and its purpose in ester reactions was discovered. The effects of drierite on reactions and its ability to absorb water was also studied. Concepts of stoichiometry were reviewed from previous classes, and integrated into this lab experiment as well.

Benzyne Formation and the Diels-Alder Reaction Preparation of 1,2,3,4 Tetraphenylnaphthalene Aubree Edwards Purpose: 1,2,3,4-tetraphenylnaphthalene is prepared by first producing benzyne via the unstable diazonium salt. Then tetraphenylcyclopentadienone and benzyne undergo a diels-alder reaction to create 1,2,3,4-tetraphenylnaphthalene. Reactions: Procedure: The reaction mixture was created. Tetraphenylcyclopentadienone (0.1197g, 0.3113 mmol) a black solid powder, anthranilic acid ( 0.0482g, 0.3516 mmol) a yellowish sand, and 1,2-dimethoxyethane (1.2 ml) was added to a 5-ml conical vial.

However, after refluxing for a while, yellow precipitates begin to form near the top of the flask. It was assumed that the remaining starting material was concentrated from a decrease volume to reappeared in solution. Nevertheless, this may have been a sign of contamination that will negatively affect the entire reaction. This observation later resulted in a yellowish

Abstract: The purpose of this experiment was to identify given Unknown White Compound by conducting various test and learning how to use lab techniques. Tests that are used during this experiment were a flame test, ion test, pH test, and conductivity test. The results drawn from these tests confirmed the identity of the Unknown White Compound to be sodium acetate (NaC2H3O2) because there were no presence of ions and sodium has a strong persistent orange color. The compound then will be synthesized with the compounds Na2CO3 and HC2H3O2 to find percent yield.

Introduction The purpose of this experiment was to learn about Friedel-Crafts alkylations, acylations, and perform the second step in the synthesis of bexarotene. Friedel-Crafts reactions are used to create carbon-carbon bonds to aromatic

This method is only useful phenols and certain heterocyclic compounds such as pyrroles and indoles. This reaction is conducted in basic solution. Yields are generally low, seldom rising above 50%.   Haller-Bauer reaction This reaction is known for the cleavage of ketones with sodium amide.

The yellow solution containing the reactants was slowly poured into the beaker containing the cold water and the acid in order to cause the precipitation of the alcohol, 9-fluorenol and to destroy (hydrolyzed) the unreacted excess sodium borohydride. Subsequently, the white precipitate was vacuum filtered and washed twice with 20.0 ml portions of distilled cold water by pouring the liquid into the Buchner Funnel during filtration. It was necessary to wash the alcohol prior to recrystallization considering that the C-OH bond is easily broken by the formation of a stable and benzylic carbocation that favors the synthesis of difluorenyl ether. Finally, before the purification by recrystallization of the obtained product, the white solid alcohol was allowed to dry over a period of a

The possible explanations and changes to make are similar to the previous questions. Conclusion and Future Experiment 18. The identity of the product and unknown were 4-tert-butylbenzyl phenol ether and tert-butyl phenol respectively. The key to making this discovery was the melting point and TLC results!