Discuss the nature of bonding in the following coordination entities on the basis of valence bond theory: (i) [Fe(CN)₆]⁴⁻ (ii) [FeF₆]³⁻ (iii) [Co(C₂O₄)₃]³⁻ & (iv) [CoF₆]³⁻
Answers
Answer:
ANSWER
(i) [Fe(CN)
6
]
4−
Co(III) with 3d
6
outer electronic configuration is d
2
sp
3
hybridised. A diamagnetic octahedral complex is formed. It is inner orbital, low spin or spin paired complex.
(ii) [FeF
6
]
3−
Fe(III) with 3d
5
outer electronic configuration is sp
3
d
2
hybridised. A paramagnetic octahedral complex is formed. It is outer orbital, high spin or spin free complex.
(iii) [Co(C
2
O
4
)
3
]
3−
Co(III) with 3d
6
outer electronic configuration is d
2
sp
3
hybridised. A diamagnetic octahedral complex is formed. It is inner orbital, low spin or spin paired complex.
(iv) [CoF
6
]
3−
Co(III) with 3d
6
outer electronic configuration is sp
3
d
2
hybridised. A paramagnetic octahedral complex is
formed. It is outer orbital, high spin or spin free complex.