Sum of oxidation state (magnitude) and coordination number of cobalt in $Na [Co (bpy) {Cl}_{4}]$ is

Question

Sum of oxidation state (magnitude) and coordination number of cobalt in Na Co bpy Cl 4 is

TestHub · Accepted Answer

2,2′-Bipyridine is an organic compound, This colorless solid is an important isomer of the bipyridine family. It is a bidentate chelating ligand, forming complexes with many transition metals.
There is one bidentate ligand and four monodentate ligand attached with Co metal ion. So, Coordination no. will be $= 6$
This bpy ligand has no net charge. and chloride ion has -1 charge. So, Oxidation state of metal ion will be $= 3$
Their sub will be = $6 + 3 = 9$

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