CHEM263 Lecture Notes - Lecture 4: Grignard Reaction, Calcium Chloride, Benzaldehyde

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champagneserval324

29 Dec 2018

School

University of Alberta

Department

Chemistry

Course

CHEM263

Professor

Christine Brzezowski

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Document Summary

Experiment 4: the experimental procedure asks that you place a calcium chloride drying tube on top of the addition funnel after flame-drying. What is the purpose of this step? (1 mark: why is it necessary to grind the magnesium turnings at the beginning of the reaction? (1. Mark: explain why methanol is not a suitable solvent for this reaction. (1 mark, use a reaction scheme to explain what would happen if you carried out this reaction using "wet" glassware. (2 marks) Post lab: provide an explanation for why biphenyl could be a potential side product with the.

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xplain step-by-step procedures for conducting this experiment using organic chemistry lab techniques. Please help me find out how I should conduct this experiment if I got such scenario in the lab. I need a step by step procudere and also need clarification on the extraction part where which layer would be what (bottom layer vs top layer). I have issues with understanding the layers and finding out which one is which.

4. An organic chemistry student was attempting to synthesize 4-dimethylaminobenzaldehyde from benzaldehyde and the reaction did not go to completion and the student ended up with a mixture of both compounds. Purify the 4-dimethylaminobenzaldehyde. Provide data to show positive identification and demonstrate its purity

Materials Available to Students in Lab: Solvents: acetone, ethanol, methanol, ethyl acetate, hexanes, dichloromethane. Aqueous Solutions: 1 M NaOH, 1 M HCl, 3 M NaOH, 3 M HCl, 1 M NaHCO3, saturated NaCl. Drying Agent: sodium sulfate, magnesium sulfate Special Glassware: TLC chambers and plates, separatory funnels

Explain step-by-step procedures for conducting this experiment using organic chemistry lab techniques. Please help me find out how I should conduct this experiment if I got such scenario in the lab. I need a step by step procudere and also need clarification on the extraction part where which layer would be what (bottom layer vs top layer). I have issues with understanding the layers and finding out which one is which.

Scenario: An organic chemistry student was attempting to synthesize 2-methoxynaphthalene from 2- napthol via an SN2 reaction with methyl iodide and the reaction did not go to completion and the student ended up with mainly the starting material and some product. Recover the 2-napthol so you can reuse it again. Provide data to show that your 2-napthol is purified and recovered.

Materials Available in the Lab: Solvents: acetone, ethanol, methanol, ethyl acetate, hexanes, dichloromethane. Aqueous Solutions: 1 M NaOH, 1 M HCl, 3 M NaOH, 3 M HCl, 1 M NaHCO3, saturated NaCl. Drying Agent: sodium sulfate Special Glassware: TLC chambers and plates, separatory funnels

violetgoat310

EXPERIMENT 3: GRINGNARD REACTION / synthesis of 2 methyl 2 butanol.
pls I need your help on this post lab questions.

CHEM263 Lecture Notes - Lecture 4: Grignard Reaction, Calcium Chloride, Benzaldehyde

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