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Question
Using valence bond theory, explain the following in relation to the complexes given below:
\[\ce{[Cr(H2O)6]^{3+}}\]
(i) Type of hybridisation.
(ii) Inner or outer orbital complex.
(iii) Magnetic behaviour.
(iv) Spin only magnetic moment value.
Solution
\[\ce{[Cr(H2O)6]^{3+}}\]:
(i) Hybridisation – d2sp3
(ii) Inner orbital complex
(iii) Paramagnetic
(iv) Magnetic moment = `sqrt(3(3 + 2))` = 3.87 B.M
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