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Explain the following: (i) CO is strong...

Explain the following:
(i) CO is stronger ligand than `NH_(3)`.
(ii) Low spin octahedral complexes of nickel are not known.
(iii) Aqueous solution of `[Ti(H_(2)O)_(6)]^(3+)` is coloured.

Text Solution

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(i) CO has high value of crystal field splitting energy than Cl.
(ii) Ni has `d^(8)` configuration which does not affect by field strength of ligand.
(iii) In this case, `Ti^(+3)` has `t_(2g)^(1) e_(g)^(0)` configuration. It can perform d-d transition.
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