Wrtie down the IUPAC name for each of the following complexes and indicate the oxidation state, electronic configuration and coordination number. Also give stereochemistry and magnetic moment of the complex.
(i). `K[Cr(H_2O)_2(C_2O_4)_2].3H_2O`
(ii). `[Co(NH_3)_5Cl]Cl_2`
(iii). `[CrCl_3(py)_3]`
(iv). `Cs[FeCl_4I`
(v). `K_4[Mn(CN)_6]`

Explanation

(a). Potassium diaquadioxalatochromate(III) hydrate.
Coordination no. `=6`. Shape`=`octahedral.
Oxidation state of `Cr=+3`
`Cr(Z=24)=3d^(5)4s^(1),Cr^(3+)=3d^(3),n=3(t_(2g)^(3)e_(g)^(0))`
`=mu=sqrt(3xx5)=sqrt(15)BM=3.87BM`
(b). Trichloridotripyridinechrornium(III)
Coordination no. Of `Cr=6`. Shape `=` Octahedral
Oxidation state of `Cr=+3`.
`Cr(Z=34)=3d^(5)4s^(1),Cr^(3+)=3d^(3)=t_(2g)^(3)e_(g)^(0),n=3,mu=sqrt(1(1+2))sqrt(3)=1.73BM`
(d). Pentaaniminechloridocobalt(III) chloride.
C.N. of `Co=6`, shape`=`octahedral
O.S. of `Co:x+0-1=+2orx=+3`
`Co(Z=27)=3d^(7)4s^(2)`,
`Co^(3+)=3d^(6)=t_(2g)^(6)e_(g)^(0),n=0,mu=0`
(e). Caesium tetrachloroferrate(III)
C.N. of `Fe=4`, shape `=` tetrahedral
O.N. Of `Fe:x-4=-1orx=3`
`Fe(Z=26)=3d^(6)4s^(2)`
`Fe^(3+)=3d^(5)=e^(2)t_(2)^(3),n=5`
`mu=sqrt(5+(5+2))=sqrt(35)=5.92BM`.