Complex	Electronic configuration of central metal ion without octahedral splitting	Electronic configuration of central metal ion after octahedral splitting	Number of unpaired electrons
${[Co {({NH}_{3})}_{6}]}^{3 +}$	${Co}^{3 +} = {}_{18}{[Ar]}$ $3 d^{6}$	$t_{2 g}^{2, 2, 2} e_{g}^{0, 0}$	0
${[Co {(C_{2} O_{4})}_{3}]}^{3 -}$	${Co}^{3 +} = {}_{18}{[Ar]}$ $3 d^{6}$	$t_{2 g}^{2, 2, 2} e_{g}^{0, 0}$	0
${[{MnCl}_{6}]}^{3 -}$	${Mn}^{3 +} = {}_{18}{[Ar]}$ $3 d^{4}$	$t_{2 g}^{1, 1, 1} e_{g}^{1, 0}$	4
${[Mn {(CN)}_{6}]}^{3 -}$	${Mn}^{3 +} = {}_{18}{[Ar]}$ $3 d^{4}$	$t_{2 g}^{2, 1, 1} e_{g}^{0, 0}$	2
${[{CoF}_{6}]}^{3 -}$	${Co}^{3 +} = {}_{18}{[Ar]}$ $3 d^{6}$	$t_{2 g}^{2, 1, 1} e_{g}^{1, 1}$	4
${[Fe {(CN)}_{6}]}^{3 -}$	${Fe}^{3 +} = {}_{18}{[Ar]}$ $3 d^{5}$	$t_{2 g}^{2, 2, 1} e_{g}^{0, 0}$	1
${[{FeF}_{6}]}^{3 -}$	${Fe}^{3 +} = {}_{18}{[Ar]}$ $3 d^{5}$	$t_{2 g}^{1, 1, 1} e_{g}^{1, 1}$	5

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