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Which of the given complex species is following E.A.N. Rule ?

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${[Cr (en)_{3}]}^{3 +}$

$[Ni (dmg)_{2}]$

$[CoBrCl (trien)]^{+}$

$[Ca (EDTA)]^{2 -}$

answer is C.

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Detailed Solution

$[Ca (EDTA)]^{2 -} 20 - 2 + (6 \times 2) = 30$
${[Cr (en)_{3}]}^{3 +} 24 - 3 + (2 \times 2 \times 3) = 33$
$[CoBrCl(trien)]^{+} 27 - 3 + 2 + 2 + (4 \times 2) = 36$
$[Ni (dmg)_{2}] 28 - 2 + (4 \times 2) = 34$

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