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The number of geometrical isomers of the complex [Co(NO2)3(NH3)3] is

1. 2
2. 3
3. 4
4. zero

Correct answer: 2

Solution

The complex [Co(NO2)3(NH3)3] is an octahedral complex. Since it has three bidentate ligands (NO2 groups) and three monodentate ligands (NH3 groups), it can exhibit two geometrical isomers: facial (fac) and meridional (mer).

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