Solveeit Logo
Login

Question

Question: Which of the following has dsp2 hybridisation and is diamagnetic in nature? (I) Na4 [Cr(CO)4] (II) ...

Which of the following has dsp2 hybridisation and is diamagnetic in nature?

(I) Na4 [Cr(CO)4] (II) [Ni(DMGH)2]

(III) [PtHBr(PEt3)2] (IV) [Ag(SCN)4]3–

(V) [AuBr4]–

A

I, II, IV only

B

I, III, IV, V only

C

II, III, V only

D

III, V only

Answer

II, III, V only

Explanation

Solution

(I) 26Cr(–IV) – 3d8 4s2 ; [Cr(CO)4]4–

CO is strong field ligand; so complex is diamagnetic and tetrahedral.

(II) 28Ni(+II) - 3d8 ; [Ni(DMGH)2]

DMGH is a chelating lignad; so complex is diamagnetic and square planar.

(III) 78Pt(+II) - 5d8 ; [PtHBr(PEt3)2]

5d8 configuration has greater CFSE, so complex is diamagnetic and square planar.

(IV) 47Ag(+I) - 4d10 ; [Ag(SCN)4]3–

No empty d-orbital is available for dsp2 hybridisation and SCN– is weak field ligand, so complex is tetrahedral and diamagnetic.

No empty d-orbital is available for dsp2 hybridisation and SCN– is weak field ligand, so complex is tetrahedral and diamagnetic.

(V) 79Au(+III) - 5d8 ; [AuBr4]–

5d8 configuration has greater CFSE, so complex is diamagnetic and square planar.