Explain, why Pt(IV) complexes are generally octahedral while Pt(II) co

1.	Explain, why Pt(IV) complexes are generally octahedral while Pt(II) complexes are square planar.
Answer» i. In case of Pt(II) complexes, the central metal atom has d8 configuration and it shows coordination number 4. ii. According to valence bond theory, central ion undergoes dsp² hybridisation which results in formation of square planar complexes. iii. In the Pt (IV) complexes, the central metal atom has d⁶ configuration and it shows coordination number 6. iv. According to valence bond theory, central ion undergoes d² sp³ or sp³ d² hybridisation which results in the formation of octahedral complexes.

Explain, why Pt(IV) complexes are generally octahedral while Pt(II) complexes are square planar.

Answer»

i. In case of Pt(II) complexes, the central metal atom has d8 configuration and it shows coordination number 4.

ii. According to valence bond theory, central ion undergoes dsp² hybridisation which results in formation of square planar complexes.

iii. In the Pt (IV) complexes, the central metal atom has d⁶ configuration and it shows coordination number 6.

iv. According to valence bond theory, central ion undergoes d² sp³ or sp³ d² hybridisation which results in the formation of octahedral complexes.