First slide

Terms used in complex chemistry

Question

The co-ordination number of cobalt in the complex $[Co {(en)}_{2} {Br}_{2}] {Cl}_{2}$ is

Easy

A

2
B

6
C

5
D

4

Solution

$[Co {(en)}_{2} {Br}_{2}] {Cl}_{2}$
C.N. of Co = 2 x number of bidentate ligand
+ 1 x number of monodentate ligand = 2 x 2 + 1 x 2 = 6.

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