Question

Write down the IUPAC names for each of the following complexes and indicate the oxidation state, electronic configuration and co-ordination number. also give stereochemistry and magnetic movement.

(i) $\large\rm { K[Cr(H_{2} O)_{2} ( C_{2} O_{4})_{2} ] \cdot 3 H_{2} O}$

(ii) $\large\rm { [CrCl_{3} ( Py)_{3} ] }$

(iii) $\large\rm { K_{4} [Mn(CN)_{6} ]}$​

Answer 1

(i) $\large\rm { K[Cr(H_{2} O)_{2} ( C_{2} O_{4})_{2} ] \cdot 3 H_{2} O}$

IUPAC NAME:- Potassium diaquadioxalato chromote (III) Trihydrate.

Oxidation state of Cr = +3

Electronic configuration:- Cr(III) = $\large\rm { t_{2g}^{3}}$

co-ordination number:- 6

stereochemistry :- octahedral

Magnetic moment : $\large\rm { \sqrt{3(3+2)}}$

$\large\rm { = 3.87 BM}$

(ii) $\large\rm { [CrCl_{3} ( Py)_{3} ] }$

IUPAC NAME:- Trichloridotripyridine chromium (III)

Oxidation state of Cr is +3

Electronic configuration:- $\large\rm { t_{2g}^{3}}$

co-ordination number is 6

Stereochemistry - octahedral

Magentic moment:- : $\large\rm { \sqrt{3(3+2)}}$

$\large\rm { = 3.87 BM}$