1. Explain why SF can exist while OF cannot exist.

4 4

2. Explain CO is non polar while OCS is polar.

2

3. Explain why H O is a liquid at room temperature while H S is a gas.

2 2

4. Arrange the following in increasing order of boiling point. C H OH, C H C H NH , CH OCH

2    5 3     8,    2    5 2 3 3

5. The bond angle in O3 is expected to be approximately:

(a) 90° (b) 120° (c) 145° (d) 180° (e) 109.5°

6. According to the VSEPR theory, the Cl-Se-Cl bond angles in the SeCl4 molecule are predicted to be:

(a) 109.5°   (b) 90° and 120° (c) 180° (d) < 109.5° (e) < 90° & < 120°

7. Complete the following table:

8. Saxitoxin is a fatally toxic natural product produced by certain marine organism. The molecules occasionally accumulate in clams and muscles during condition of red tide.

a) Give the hybridization for the atoms labeled

A:  B:  C:  D:  

b) Give approximate bond angles about the atoms labeled E:  F:  G:  A:  

c) How many pi bonds are there?  

d) How many lone pairs of electrons are there?  

2

e) What is the total number of sp  hybrid atoms?  

9. Draw all structural isomers of C7H16, and name each compound with IUPAC name.

10. Recognize the functional groups involved in the following structure:

11. Draw the structures that correspond to the following names:

trans‐4,5‐dimethyl‐2‐cyclohexenone 4‐chloro‐2‐isopropylbenzaldehyde

3‐amino‐2,4‐diethylhexanal 2‐iodo‐4‐methyl‐1‐hexanol

3,5,5‐trimethyl‐4‐nitrononane cis‐4‐cyclopropyl‐5‐methyl‐2‐octene