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Question:

Write the types of isomerism exhibited by the following complexes: (i) [Co(NH3)5Cl]SO4 (ii) [Co(en)3]3+ (iii) [Co(NH3)6][Cr(CN)6]

Solution:

(i) Ionisation isomerism
(ii) Optical isomerism (see diagram)
(III) Coordination isomerism