Coordination Compounds

Which of the following coordination compounds would exhibit optical isomerism?

1. Pentaamminenitrocobalt (III) iodide
2. Diamminedichloroplatinum (II)
3. trans-Dicyanobis (ethylenediamine) chromium (III) chloride
4. tris-(Ethylenediamine) cobalt (III) bromide.

Among [Ni(CO)4], [Ni(CN)4]2-, [NiCl4]2- species, the hybridisation states at the Ni atom are, respectively [Atomic number of Ni = 28]

1. sp3, dsp2, dsp2
2. sp3, dsp2, sp3
3. sp3, sp3, dsp2
4. dsp2, sp3, sp3

CN- is a strong field ligand. This is due to the fact that

1. it carries negative charge
2. it is a pseudohalide
3. it can accept electrons from metal species
4. it forms high spin complexes with metal species.

Considering H2O as a weak field ligand, the number of unpaired electrons in [Mn(H2O)6]2+ will be (atomic number of Mn = 25)

1. three
2. five
3. two
4. four

Which of the following does not have a metal carbon bond?

1. Al(OC2H5)3
2. C2H5MgBr
3. K[Pt(C2H4)Cl3]
4. Ni(CO)4

In an octahedral structure, the pair of d orbitals involved in d2sp3 hybridisation is

1. dx2-y2, dz2
2. dxz, dx2-y2
3. dz2, dxz
4. dxy, dyz

Which of the following is considered to be an anticancer species?

1. [figure]
2. [figure]
3. [figure]
4. [figure]

Vitamin B12 contains

1. Fe(II)
2. Co(III)
3. Zn(II)
4. Ca(II)

The number of unpaired electrons in the complex ion [CoF6]3- is (Atomic no. : Co = 27)

1. 2
2. 3
3. 4
4. zero

Among the following which is not the -bonded organometallic compound?

1. K[PtCl3( 2-C2H4)]
2. Fe( 5-C5H5)2
3. Cr( 6-C6H6)2
4. (CH3)4Sn