Coordination Compounds - Result Question 4
####4. The sum of coordination number and oxidation number of the metal $M$ in the complex $[M(en)_2(C_2 O_4)] Cl$ (where $e n$ is ethylenediamine) is:
(a) 9
(b) 6
(c) 7
(d) 8 [2015 RS]
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Solution:
- (a) $[M(\text{ en })_2(C_2 O_4)] Cl$
$C_2 O_4=$ bidentate ligand, carry -2 charge
en $=$ bidentate ligand, carry 0 charge
$\therefore$ Mcarry +3 charge; coordination number $=6$
$\therefore$ Sum $=+3+6=9$
