Practice prelim 3

Practice prelim 3 - Page 2 of 7 1. (21 points) Select from...

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Select from the following list of eight solvents (or solvent mixtures) in answering parts (a) through (g) below. Using the name or formula for a solvent, write your answers in the appropriate box below each question. Note that any one solvent may be a correct answer to more than one question. (a) Which one entry in the above list would best be used as solvent for the S N 1 reaction? Page 2 of 7 1:1 H 2 O:CH 3 OH CHCl 3 hexane CH 3 CH 2 OCH 2 CH 3 dimethylsulfoxide (DMSO) CH 3 CO 2 H HCON(CH 3 ) 2 (DMF, dimethylformamide) C 6 H 5 CH 3 (toluene) (b) In which two solvents would the nucleophilicity of F - be strongest? (c) Which one solvent would best be used to prepare a Grignard compound? (d) Which solvent(s) is/are protic and nonpolar? (e) Which solvent has the l o w e s t pKa value? (f) Which one of the four solvents in the left-hand column of the above list would best be used to carry out an E2 reaction with KOC(CH 3 ) 3 ? (g) Sulfolane, which is shown below, is a less-commonly used, but valuable, organic solvent. Describe the properties of this solvent using the t h r e e c r i t e r i a used to characterize solvents. S
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This note was uploaded on 11/10/2009 for the course CHEM 1570-001 taught by Professor Tadhgbegley during the Fall '08 term at Cornell.

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Practice prelim 3 - Page 2 of 7 1. (21 points) Select from...

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