Question

Metal in complex have low oxidation state when ligands are:

(1) Good π accepter.

(2) Good a donor.

(3) Poor & donor.

(4) Poor л donor.

Answer 1

Correct option is (1) Good π accepter.

When metal has low oxidation state, it has more electron density in d orbital. So it has more tendency to back donate electrons. Thus compound must have good π acceptor ligand.