Chemistry Class 12 NCERT Solutions: Chapter 9 Coordination Compounds Part 9

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Q: 24. 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)

(ii)

(iii)

(iv) Cs[FeCl_4]

(v)

Answer:

(i) Potassium diaquadioxalatochromate (III) trihydrated.

Oxidation state of chromium

Electronic configuration:

Coordination number

Shape: octahedral

Stereochemistry:

Q 24 i Trans and Cis

Q 24 I Trans and Cis

Q 24 i Trans and Cis

Q 24 i 1 Trans is Optically Inactive

Q 24 I 1 Trans Is Optically Inactive

Q 24 i 1 Trans is Optically Inactive

Q 24 i 2 Cis is Optically Active

Q 24 I 2 Cis Is Optically Active

Q 24 i 2 Cis is Optically Active

Magnetic moment,

(ii)

IUPAC name: Pentaamminechloridocobalt(III) chloride

Oxidation state of

Coordination number

Shape: octahedral.

Electronic configuration:

Q 24 ii 2 Isomers

Q 24 Ii 2 Isomers

Q 24 ii 2 Isomers

Magnetic Moment

(iii)

IUPAC name: Trichloridotripyridinechromium (III)

Oxidation state of chromium

Electronic configuration for

Coordination number

Shape: octahedral.

Stereochemistry:

Q 24 iii Facial Isomer and Meriodional Isomer

Q 24 Iii Facial Isomer and Meriodional Isomer

Q 24 iii Facial Isomer and Meriodional Isomer

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

Magnetic moment,

(iv)

IUPAC name: Caesium tetrachloroferrate (III)

Oxidation state of

Electronic configuration of

Coordination number

Shape: tetrahedral

Stereochemistry: optically inactive

Magnetic moment:

(v)

Potassium hexacyanomanganate(II)

Oxidation state of manganese

Electronic configuration:

Coordination number

Shape: octahedral.

Stereochemistry: optically inactive

Magnetic moment,