Consider the following complexes:

$V (C O)_{6}$

$F e (C O)_{5}$

$C r (C O)_{6}$

$[M n (C O)_{6}]$

$[P t C l_{6}]^{2 -}$

Among the given complexes, number of complexes which have $18 e^{-}$ in their valence shell is/are:

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Solution

$V$ atom in $V (C O)_{6}$ contains 17 valence electrons. 12 electrons are from 6 $C O$ ligands and 7 electrons are from $V$ . Hence, the complex does not obey 18-electron rule.
$F e (C O)_{5} = 8 + 5 \times 2 = 18 e^{-}$
$C r (C O)_{6} = 6 + 6 \times 2 = 18 e^{-}$
$[M n (C O)_{6}] \to 7 + (6 \times 2) = 19 e^{-} [P t (C l)_{6}]^{2 -} \to 6 + (6 \times 2) = 18 e^{-}$

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Similar questions

[V (C O)_{6}]^{-}, [C r (C O)_{6}]

[M n (C O)_{6}]^{+}

[P t {(N H_{3})}_{4}] [P t C l_{6}]

[P t {(N H_{3})}_{4} C l_{2}] [P t C l_{4}]

The incorrect statement(s) among the following is(are):

i) Primary valency of a transition metal ion in complex represent its oxidation number.

ii) $Z n^{2 +}$ is colourless.

iii) $M n C l_{2}$ exhibits green color in aqueous solution.

iv) $F e, C o, N i$ complexes are diamagnetic in nature.

Which of the following elements have 6 electrons in their valence shell?

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