Organometallic Solutions: #3

 

3.* (1996 2 2) For each of the following diamagnetic, coordinatively saturated ("18 electron") complexes:

1. Identify the metal,
2. Indicate the oxidation state of the metal,
3. Show the number of d electrons.

Note that the nature of the metal (3d, 4d, or 5d) is specified.

A. M(CO)4 (3d)

CO is a neutral sigma base and a p acid, 2 electron donor.
1. Ni
2. (0)
3. d10

B. (C6H6)2M+ (5d)

The ligand is benzene, which is a neutral 6-electron donor. The complex is a "sandwich molecule":

1. Re
2. (I)
3. d6

C. [Cp2M] (3d)

The ligand is cyclopentadienyl, which is a 6 electron donor with a -1 charge. The complex is a "sandwich molecule":

1. Re
2. (I)
3. d6