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

Chapter 12 Pre-Quiz

1. On page 435, your text has an error in that it refers to light ions as both "deflected too little" and "deflected too much." The correct wording should be

a) Light ions are deflected too little. Heavy ions are deflected too much.

b) Heavy ions are deflected too little. Light ions are deflected too much.

2. The parent molecular ion of a stable hydrocarbon will have

a) an even (m/z) value

b) an odd (m/z) value

c) an (m/z) value that could be either even or odd

d) a range of (m/z) values

3. A likely place for fragmentation in propyne is

a) C-H on C-1

b) C-H on C-2

c) C-H on C-3

d) C1-C2

e) C2-C3

4. A compound with M and M+2 peaks at 94 and 96 in about equal intensities is most likely

(give the IUPAC name)

bromomethane

5. A likely base peak for 1,5-hexadiene is

a) 84

b) 80

c) 42

d) 41

e) 15