Question 27 of 34intermediate🔧 ApplyShort Answer3 marks
Give the oxidation state, d orbital occupation and coordination number of the central metal ion in the following complexes:
(i)
K3[Co(C2O4)3]
Answer
Oxidation state: +3; d orbital occupation: d⁶; Coordination number: 6
(ii)
cis-[CrCl2(en)2]Cl
Answer
Oxidation state: +3; d orbital occupation: d³; Coordination number: 6
(iv)
[Mn(H2O)6]SO4
Answer
Oxidation state: +2; d orbital occupation: d⁵; Coordination number: 6
Explanation
For each complex, the oxidation state is calculated by balancing charges. C₂O₄²⁻ is a didentate ligand with -2 charge, en (ethane-1,2-diamine) is a didentate neutral ligand, Cl⁻ is monodentate with -1 charge, and H₂O is monodentate neutral ligand. The coordination number equals the total number of donor atoms bonded to the central metal ion.