Question

1. Write the structural formula for: 4-methyl- 1,3-pentandiol

2.What does this experiment suggest about the mechanism of addition    of hydrogen to a double bond?   

m.p.(oC) b.p(oC)    

cis-1,2-dimethylcyclohexane             -50         130    

trans-1,2-dimethylcyclohexane             -89           123

3.Draw and name (including R,S) the stereochemical isomers of:     (Use Fischer projections)   

a. CH3-CHCl-CHCl-CH3        b. CH3-CHBr-CHCl-CH3

.

4. In the following SN2 reactions, identify the nucleophile and the substrate.     Which nucleophile is stronger? Explain.    

CH3CH2CH2Cl + CH3CH2O- ---> CH3CH2CH2OCH2CH3 + Cl-    

CH3CH2CH2Cl + CH3CH2OH ---> CH3CH2CH2OCH2CH3 + HCl

Answer 1