Question

(please try to answer all the questions and include the work)

8) In general, ethers have a much lower boiling point than their isomeric alcohols. Why?

A. The carbon-oxygen bond in ethers is nonpolar.

B. Unlike alcohols, ethers cannot act as Lewis bases.

C. Ethers are less reactive than alcohols.

D. Unlike alcohols, ethers cannot hydrogen bond with each other.

10) Nucleophilic addition to an epoxide occurs...

A. on the least substituted side of the epoxide.

B. on the most substituted side of the epoxide.

C. after the oxygen has been protonated.

D. as the step-wise addition to the epoxide, followed by elimination of the O.

12) Consider the conversion of 1-butanol to each of the compounds shown below. In which conversion is an oxidizing agent needed?

A. CH3CH2CH=CH2

B. CH3CH2CH2CH2Br

C. (CH3CH2CH2CH2)2O

D. CH3CH2CH2CHO

13) Which one of the following diols would cleave into two fragments with HIO4?

A. 1,3-hexanediol

B. 2,4-hexanediol

C. 3,4-hexanediol

D. 1,6-hexanediol

14) A crown ether increases the rate of an Sn2 reaction by...

A) solvating the nucleophile.

B) dissolving the product of the reaction.

C) separating the anion and cation of the reactant.

D) lowering the energy of the intermediate.