Engineering
Chemistry
Werners Theory and Sidwicks EAN Rule
Colour and Magnetism
Isomerism in Coordination Compounds
Question
The effective atomic number of Mn, in Mn2(CO)10 is _____.
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Solution
The formula for effective atomic number (EAN) is ⇒ Z – O.S + 2CN
here,
Z = atomic number
O.S = oxidation state
CN = coordination number
So, FOR 2 Mn
Z = 2 × 25
O.S = 0
CN = 10 (for 10 CO ) + 1 (for 1 Mn-Mn sigma bond)
Thus CN = 11
EAN = 2 × 25 – 0 + 11 × 2
50 + 22
72
Thus 72 for 2 Mn
or 72/2 for 1Mn
= 36