The C≡N triple bond in acetonitrile has a dipole moment of about 3.6 D and a bond length of about 1.16 Å. Calculate the amount of charge separation in this bond. How important is the charge-separated resonance form in the structure of acetonitrile?

For each of the following compounds,

1. draw the Lewis structure.

2. show how the bond dipole moments (and those of any nonbonding pairs of electrons) contribute to the molecular dipole moment.

3. estimate whether the compound will have a large, small, or zero dipole moment.

e.

Circle the functional groups in the following structures. State to which class (or classes) of compounds the structure belongs.

d. CH₃CONH₂

e. CH₃NHCH₃

f. RCOOH

For each of the following compounds,

1. draw the Lewis structure.

2. show how the bond dipole moments (and those of any nonbonding pairs of electrons) contribute to the molecular dipole moment.

3. estimate whether the compound will have a large, small, or zero dipole moment.

d.

For each of the following compounds,

1. draw the Lewis structure.

2. show how the bond dipole moments (and those of any nonbonding pairs of electrons) contribute to the molecular dipole moment.

3. estimate whether the compound will have a large, small, or zero dipole moment.

a. CH₃CH=NCH₃

b. CH₃CH₂OH

c. CBr₄

Circle the functional groups in the following structures. State to which class (or classes) of compounds the structure belongs.

a. CH₂=CHCH₂COOCH₃

b. CH₃OCH₃

c. CH₃CHO

Circle the functional groups in the following structures. State to which class (or classes) of compounds the structure belongs.

(g)

(h)

(i)