Wrtie down the IUPAC name for each of the following complexes and indicate the oxidation state, electronic configuration and coordination number.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

(i) `K[Cr(H_(2)O)_(2)(C_(2)O_(4))_(2)]^(-3)H_(2)O` IUPAC name is potassium diaquadioxalato chromate (III) hydrate
Coordination number =6
Oxidation state of `Cr: x+0+2(-2)=-1`
`:.x=+3`
Shape is octahedral electronic configuration of
`Cr^(3+)=3d^(3)=t^(3)2g^(e^(@))g`
`mu=sqrt(n(n+2))=sqrt(3x5)=sqrt(15)BM`
`=3-87 BM`
(ii) `[Co(NH_(3))_(5)=CllCl_(2)` IUPAC name is pentaamminechloridocobalt (III) chloride
Coordination number of Co=6 Shape is octahedral Oxidation state of `x+0-1=+2:. x=+3`
Electronic configuration of `Co^(3+)=3d^(6)=t^(6)2g^(e^(@))g`
`n=0, mu=0`
(iii) `CrCl_(3)(Py)_(3)` IUPAC name is trichloridotripyridine chromium (III)
Coordination number of `Cr=6`
Oxidation state of `Cr, x-3+0=0`
x=3
Electronic configuration of `Cr^(3+)=3d^(3)=t_(2g)^(3)e_(g)^(0)`
Unpaired electrons (n)=3
`mu=3.87BM`
(iv) `Cs[FeCl_(4)]`
IUPAC name is
cesium tetrachloridoferrate (III)
Coordination number of Fe is 4
Shape is tetrahedral
Oxidation number of `Fe, x-4=-1`
`rArr x=+3`
Electronic configuration of `Fe^(3+)=t_(2g)^(3)e_(g)^(2)`
n=5
`mu=sqrt(5(5+2))=sqrt(35)=5.92Bm`
(v) `K_(4)[Mn(CN)_(6)]`
IUPAC name is
potassium hexacynomagnate(III)
Coordination number of Mn=6
Shape is octahedral Oxidation state of Mn is `x-6=-4`
x=+2
Electronic configuration of
`Mn^(2+)=3d^(5)=t_(2g)^(5)e_(g)^(0)`
n=1
`mu=sqrt(1(1+2))=sqrt(3)=1.73BM`