Chem 335 - Winter 2000
Organic Chemistry II
Dr. Carl C. Wamser

Chapter 10 Pre-Quiz

1. Dimethylacetylene is a common name for

a) methylpropyne

b) 1,1-dimethylethyne

c) 1,2-dimethylethyne

d) 1-butyne

e) 2-butyne

2. Addition of excess Cl2 to 1-pentyne should give a compound with the molecular formula

a) C5 H10 Cl2

b) C5 H10 Cl4

c) C5 H12 Cl4

d) C5 H8 Cl4

e) C5 H8 Cl2

3. An acetylide anion could be made from reaction of NaNH2 with

a) 1-hexyne

b) 2-hexyne

c) 3-hexyne

d) all of these

4. If a terminal alkyne has a pKa of 25, that means that in an aqueous solution at pH 14, the alkyne will be primarily

a) neutral

b) anionic

c) about equal amounts of both

5. The sodium salt of 1-propyne could be used in an SN2 reaction to prepare

a) 1-butyne

b) 2-butyne

c) 3-hexyne

d) all of the above

e) none of the above