First slide

Aplicaitons of VBT

Question

Which of the following complexes exhibits the highest paramagnetic behaviour?

Easy

A

${[T i {(N H_{3})}_{6}]}^{3 +}$
B

${[F e (e n) (b p y) {(N H_{3})}_{2}]}^{2 +}$
C

${[C o {(O X)}_{2} {(O H)}_{2}]}^{-}$
D

${[V {(g l y)}_{2} {(O H)}_{2} {(N H_{3})}_{2}]}^{+}$

Solution

Fe²⁺, Co⁵⁺, Ti³⁺ and V³⁺ have 4, 4, 1, 2 unpaired electrons respectively. The pairing leads Fe²⁺ with no unpaired electron.

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