Question

What are the coordination compounds that can be formed from Co 3+, NH3, CN-1 and K+ and which of these can exist as geometric isomers? Eg. of a compound formed: [Co(NH3)6](CN)3?

Answer 1

 [Co(NH3)6](CN)3

 [Co(NH3)3(CN)3]

 K3[Co(CN)6]

K2[Co(CN)5(NH3)]

K[Co(CN)4(NH3)2] - geometric isomers

[Co(NH3)4(CN)2]CN - geometric isomers

[Co(NH3)5(CN)](CN)2