Which one of the following cyano complexes would exhibit the lowest value of paramagnetic behaviour? (Atomic no. Cr=24, Mn=25, Fe=26, Co=27)

Question

Which one of the following cyano complexes would exhibit the lowest value of paramagnetic behaviour? (Atomic no. Cr=24, Mn=25, Fe=26, Co=27), C o C N 6 3 -, F e C N 6 3 -, M n C N 6 3 -, C r C N 6 3 -

MARKS App · Accepted Answer

Hybridization Unpaired electrons Magnetic moment C o C N 6 3 - d 2 sp 3 0 0 F e C N 6 3 - d 2 sp 3 1 3 BM M n C N 6 3 - d 2 sp 3 2 8 BM C r C N 6 3 - d 2 sp 3 3 15 BM

	Hybridization	Unpaired electrons	Magnetic moment
${[C o {(C N)}_{6}]}^{3 -}$	$d^{2} {sp}^{3}$	0	0
${[F e {(C N)}_{6}]}^{3 -}$	$d^{2} {sp}^{3}$	1	$\sqrt{3}$ BM
${[M n {(C N)}_{6}]}^{3 -}$	$d^{2} {sp}^{3}$	2	$\sqrt{8}$ BM
${[C r {(C N)}_{6}]}^{3 -}$	$d^{2} {sp}^{3}$	3	$\sqrt{15}$ BM

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