The type of isomerism present in Pentaminenitrochromium (III) chloride is

Which of the following coordination compounds would exhibit optical isomerism?

Solution

The optical isomers are pair of molecules which are non superimposable mirror images of each other.

The two optically active isomers are collectivity called enantiomers.

Which one of the following octahedral complexes will not show geometric isomerism? (A and B are monodentate ligands)

Which of the following will give maximum number of isomers?

Solution

[Cr(SCN)₂(NH₃)₄]⁺ shows linkage, geometrical and optical isomerism. Hence produces maximum no. of isomers.

Which one of the following forms, with an excess of CN^–(cyanide), a complex having co-ordination number two?

Solution

Among the given metal ions only Ag⁺ forms complex with CN^– having co-ordination number 2.

Ag + 2CN^– → [Ag(CN)₂]^– Coordination number of metals is defined as the number of σ bonds by which ligands are attached to the metalatom.

he number of geometrical isomers for [Pt (NH₃)₂Cl₂] is

Solution

Pt (NH₃)₂Cl₂ is a disubstituted complex and shows only cis-& trans-isomers

The ligand called π acid is:

Solution

Due to back bonding present between metal and carbonyl ligand in metal carbonyl, CO is termed as π-acid ligand.

Pick out the complex compound in which the central metalatom obeys EAN rule strictly

Solution

In complex K₄[Fe(CN)₆] the Fe obey EAN rule strictly.As in this complex EAN of Fe is 36, which corresponds to the atomic number of krypton

Hence, according to sidwick the complex will be stable

The effective atomic number of cobalt in the complex[Co(NH₃)₆]³⁺is

Solution

EAN = at. no. of central atom– oxidation state + 2 ×(no. of ligands) = 27 – 3 + 2 × 6 = 36.

In [Ni(NH₃)₄]SO₄, the E.A.N. of Ni is

Solution

EAN = (atomic no) – (oxidation state) + (2 × number of Ligands) = 28 –2 + 2 × 4 = 34

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