(i) Potassium diaquadioxalatochromate (III) trihydrate.
Oxidation state of chromium = 3
Electronicconfiguration: 3d3: t2g3
Coordination number = 6
Shape: octahedral
Stereochemistry:
Magnetic moment, μ 
∼ 4BM
(ii) [Co(NH3)5Cl]Cl2
IUPAC name: Pentaamminechloridocobalt(III)chloride
Oxidation state of Co = +3
Coordination number = 6
Shape: octahedral.
Electronicconfiguration: d6: t2g6.
Stereochemistry:
Magnetic Moment = 0
(iii) CrCl3(py)3
IUPAC name: Trichloridotripyridinechromium(III)
Oxidation state of chromium = +3
Electronicconfiguration for d3 = t2g3
Coordination number = 6
Shape: octahedral.
Stereochemistry:
Both isomers are optically active. Therefore,a total of 4 isomers exist.
Magnetic moment,μ
∼ 4BM
(iv) Cs[FeCl4]
IUPAC name: Caesium tetrachloroferrate (III)
Oxidation state of Fe = +3
Electronicconfiguration of d6 = eg2t2g3
Coordination number = 4
Shape: tetrahedral
Stereochemistry: optically inactive
Magnetic moment:
μ
(v) K4[Mn(CN)6]
Potassium hexacyanomanganate(II)
Oxidation state of manganese = +2
Electronicconfiguration: d5+: t2g5
Coordination number = 6
Shape: octahedral.
Streochemistry: optically inactive
Magnetic moment,μ
