First slide

Terms used in complex chemistry

Question

Coordination number of Ni in ${[Ni {(C_{2} O_{4})}_{3}]}^{4 -}$ is:

Easy

A

3
B

4
C

5
D

6

Solution

$C_{2} O_{4}^{2 -}$ is a bidentate group. As the complex contains three bidentate groups, the central metal ion has a coordination number of 6.

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