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5. (15 pts.) Indicate if the following species are chiral or achiral.

achiral chiral achiral

OsH

HfH

NCl

chiral

achiral

6. (10 pts.) The H-bonding between NH

and NH

, [H

N⋯H⋯NH

]

can be readily explained by

MO Theory. Consider the lone pairs on each ammonia to be sp

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

1 2 3 4 5 6

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