More Examples
Fe(CO)5 Fe(0) d8 thus 8 +2(5) = 18
Cr(CO)6 Cr(0) d6 thus 6 + 2(6) = 18
[Fe(CO)4]2- Fe(2-) d10 thus 10 +2(4) = 18
Fe2(CO)9 Fe(0) d8 thus
2 metals 2(8)
CO ligands 9(2)
M-M bond 2
Total 36
can view bridging CO
as 3 center 2 electron bond
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