One cationic complex has two isomers A and B. Each has one Co3+, five NH3, one Br−, and one SO2−4 stoichiometrically. A gives white ppt with BaCl2 while B give yellow ppt with AgNO3.
B can be :
A
[Co(NH3)5SO4]Br
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B
[Co(NH3)5]BrSO4
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C
[Co(NH3)3Br(SO4)].2NH3
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D
None of these
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Solution
The correct option is A[Co(NH3)5SO4]Br B gives yellow ppt. with AgNO3 confirming the formation of AgBr. Hence it is confirmed that Br is out of the coordination sphere. B is [Co(NH3)5SO4]Br