Give the oxidation state, d-orbital occupation and coordination number of the central metal ion in the following complexes: i) `K_3[Co(C_2 O_4)_3]` ii) Cis- `[Cr(en_2) Cl_2] Cl` iii) `(NH_4)_2[CoF_4]`. iv) `Mn[(H_2 O)_6] S O_4`

Explanation

i) .K_3[Co(C_2 O_4)_3].
.operatornameCo(27):[. Ar .] 4 s^2 3 d^7.
Oxidation state of cobalt is .+3. and coordination number is 6 .
ii) .Cis-[Cr(en_2) Cl_3] Cl.
.Cr^3+: 4 s^circ 3 ~d^3.
.x+0-2-1=0 rarr x=+3.
Cr has oxidation state .+3., coordination number is 6 . ii) .(NH_4^circ)_2[CoF_4].
.Co(27): 4 ~s^2 3 ~d^7.
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