Question

Consider the following statements ;

S1 : The [Co(ox)3]3 – complex is diamagnetic and gains stability through chelation.

**S2 :**The [Co(NO2)6]4 – is inner orbital complex involving d2sp3hybridisation and is paramagnetic.

**S3 :**The complex [PtCl4]2 – is square planar and diamagnetic. and arrange in the order of true / false

• A. T TT
• B. F F T
• C. T F T
• D. T T F

Answer 1

Answer: (A)

T TT

Answer 2

S1 :

chelate complex, diamagnetic and has d2sp3 hybridisation.

[Co(ox)3]3 – 3d6

S2 : NO2– is strong field ligand and thus it is inner orbital complex and paramagnetic with one unpaired electron present in higher 4d-orbital

[Co(NO2)6]4– 3d7

S3 : 5d8 configuration; thus diamagnetic and dsp2 hybridisation (5d8 has higher CFSE so that Do > p)