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Class 12
Chemistry
Coordination Compounds
write down the iupac name for each of the followin...

Question:
Write 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(H₂O)₂(C₂O₄)₂].3H₂O

(ii) [Co(NH₃)₅Cl]Cl₂

(iii) CrCl₃(py)₃

(iv) Cs[FeCl₄]

(v) K₄[Mn(CN)₆]

Answer:

(i) Potassium diaquadioxalatochromate (III) trihydrate.

Oxidation state of chromium = 3

Electronic configuration: 3d³: t_2g³

Coordination number = 6

Shape: octahedral

Stereochemistry:

(ii) [Co(NH₃)₅Cl]Cl₂

IUPAC name: Pentaamminechloridocobalt(III) chloride

Oxidation state of Co = +3

Coordination number = 6

Shape: octahedral.

Electronic configuration: d⁶: t_2g⁶.

Stereochemistry:

Magnetic Moment = 0

(iii) CrCl₃(py)₃

IUPAC name: Trichloridotripyridinechromium (III)

Oxidation state of chromium = +3

Electronic configuration for d³ = t_2g³

Coordination number = 6

Shape: octahedral.

Stereochemistry:

Both isomers are optically active. Therefore, a total of 4 isomers exist.

(iv) Cs[FeCl₄]

IUPAC name: Caesium tetrachloroferrate (III)

Oxidation state of Fe = +3

Electronic configuration of d⁶ = e_g²t_2g³

Coordination number = 4

Shape: tetrahedral

Stereochemistry: optically inactive

Magnetic moment:

(v) K₄[Mn(CN)₆]

Potassium hexacyanomanganate(II)

Oxidation state of manganese = +2

Electronic configuration: d⁵⁺: t_2g⁵

Coordination number = 6

Shape: octahedral.

Streochemistry: optically inactive

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