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The d electron congfiguration of {C}{r}^{{{2}+}} , {M}{n}^{{{2

Question

The d electron congfiguration of $C r^{2 +}$ , $M n^{2 +}$ , $F e^{2 +}$ and $N i^{2 +}$ are $3 d^{4}$ , $3 d^{5}$ , $3 d^{6}$ and $3 d^{8}$ respectively. Which one of the folowing aqua complexes will exhibit the minimum paramagnetic behaviour ?
$(A t . N o . C r = 24, M n = 25, F e = 26, N i = 28)$

[F e (H_{2} O)_{6}]^{2 +}

[N i (H_{2} O)_{6}]^{2 +}

[C r (H_{2} O)_{6}]^{2 +}

[M n (H_{2} O)_{6}

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Charlotte Discussed

The d electron congfiguration of

C r^{2 +}

M n^{2 +}

F e^{2 +}

and

N i^{2 +}

are

3 d^{4}

3 d^{5}

3 d^{6}

and

3 d^{8}

respectively. Which one of the folowing aqua complexes will exhibit the minimum paramagnetic behaviour ?

(A t . N o . C r = 24, M n = 25, F e = 26, N i = 28)

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Text solutionVerified

As the number of unpaired electron increases, the magnetic moment increases and hence, the paramagnetic behaviour increases.

S o, C r^{2 +} (22) = 3 d^{4} (4 unpaired electrons)

M n^{2 +} (23) = 3 d^{5} (5 unpaired electrons)

F e^{2 +} (24) = 3 d^{6} (4 unpaired electrons)

N i^{2 +} (26) = 3 d^{8} (2 unpaired electrons)

S o, [N i (H_{2} I)_{6}]^{2 +} exhibit minimum paramagnetic behaviour

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Question Text	The d electron congfiguration of $C r^{2 +}$ , $M n^{2 +}$ , $F e^{2 +}$ and $N i^{2 +}$ are $3 d^{4}$ , $3 d^{5}$ , $3 d^{6}$ and $3 d^{8}$ respectively. Which one of the folowing aqua complexes will exhibit the minimum paramagnetic behaviour ? $(A t . N o . C r = 24, M n = 25, F e = 26, N i = 28)$
Answer Type	Text solution:1
Upvotes	150