Question

Pick out the paramagnetic species of the following

Solution

Correct option is

[Ni(NH3)6]2+

 

(a) Fe (0) = 3d64s2. CO is a strong field ligand and hence forces 4s2electrons to shift and pair up into 3d. Thus, dsp3 geometry and n = 0.

(b) Cr (0) : 3d54s1 → 3d6 (under the influence of strong ligand  CO; d2sp3hybridization (n = 0)

(c) Fe (II) : 3d6d2sp3 hybridization (CN – strong ligand), n = 0 

(d) Ni (II) : 3d8sp3d2 complex (no availability of two vacant 3d orbitals),n = 2

SIMILAR QUESTIONS

Q1

The aqueous 0.01 m of [Co(NH3/6][Co(NH3)(NO2)5]3 is expected to have the depression of freezing point (Kf for water = 1.86 K/m)

Q2

Ethylenediaminetetraacetic acid (EDTA) is the antidote for lead poisoning. It is administered in the form of 

Q3

 

Which of the following ions are expected to be paramagnetic to the same extent? 

I. [FeF6]3–                              II. [MnCl4]2–

III. [NiCl4]2–     

Q4

Which of the following is an outer orbital complex?

Q5

The most stable ions is

Q6

Which of the following has the largest number of isomers?

Q7

The number of geometric isomer of the complex Cr(NH3)3Cl3 is

Q8

A coordination complex having which one of the following descriptions would be paramagnetic to the maximum extent?

Q9

 

Consider the complex : K3[Co(C2O4)2Cl2

The coordination number, the oxidation number of Co and the number of unpaired electrons on the metal are respectively

Q10

 

Arrange the following in the increasing order of paramagnetism : 

I: [Fe(H2O)6]Cl3

II: K4[Fe(CN)6

III: K3[Fe(CN)6

IV: [Fe(H2O)6]SO4.H2O