
4
5. (15 pts.) Indicate if the following species are chiral or achiral.
CN
l
a.
O
H
3
C
H
H
H
b.
P
H
F
c.
achiral chiral achiral
H
OsH
3
NC
NH
3
H
3
N
Cl
O
d.
NH
2
HfH
2
NCl
l
Cl
Cl
e.
chiral
achiral
6. (10 pts.) The H-bonding between NH
4
+
and NH
3
, [H
3
N⋯H⋯NH
3
]
+
can be readily explained by
MO Theory. Consider the lone pairs on each ammonia to be sp
3
hybrids. With these two
orbitals and the hydrogen orbital, derive the MO energy level diagram for the N⋯H⋯N
interaction. Show the electron occupation of this MO diagram. Draw pictorial representations
of all molecular orbitals.
•
•
•
bonding
nonbonding
antibonding
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