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  4. The effective atomic number (EAN) of central metal atom in [Co(NH3)6]Cl3 is (at. no. of Co=27]

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Q. The effective atomic number (EAN) of central metal atom in $[Co(NH_3)_6]Cl_3$ is (at. no. of $Co=27$]

COMEDKCOMEDK 2012Coordination Compounds

Solution:

$EAN = Z -( O \cdot N \cdot)+2 \times( CN \cdot)$
$[ Z =$ atomic number,
O.N. = Oxidation number,
$C . N .=$ Coordination number]
$=27-3+2 \times 6=36$