For the complex [ R h ( e n ) 3 ] 3 + whether optical isomers are present has to be determined and the same (mirror images) have to be drawn. Concept Introduction: Co-ordination compounds exhibit structural isomerism and stereoisomerism. Stereoisomerism deals with three dimensional spatial arrangements of atoms or groups of a molecule. There are two types of stereoisomerism – Geometric isomerism and optical isomerism. A cis isomer has two same ligands lying adjacent to each other whereas a trans isomer has two same ligands lying opposite to each other. In optical isomerism the isomer that rotates the plane of the polarized light in clockwise direction is termed as d-isomer and the isomer rotates the plane of the polarized light in anti-clockwise direction is l-isomer. These isomers are called optical isomers and they are non-superimposable mirror images.

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Chapter 22, Problem 22.56QP

(a)

Interpretation Introduction

Interpretation:

For the complex [Rh(en)3]3+ whether optical isomers are present has to be determined and the same (mirror images) have to be drawn.

Concept Introduction:

Co-ordination compounds exhibit structural isomerism and stereoisomerism. Stereoisomerism deals with three dimensional spatial arrangements of atoms or groups of a molecule. There are two types of stereoisomerism – Geometric isomerism and optical isomerism.

A cis isomer has two same ligands lying adjacent to each other whereas a trans isomer has two same ligands lying opposite to each other.

In optical isomerism the isomer that rotates the plane of the polarized light in clockwise direction is termed as d-isomer and the isomer rotates the plane of the polarized light in anti-clockwise direction is l-isomer. These isomers are called optical isomers and they are non-superimposable mirror images.

(b)

Interpretation Introduction

Interpretation:

For the complex cis - [Cr(NH3)2(SCN)4]− whether optical isomers are present has to be determined and the same (mirror images) have to be drawn.

Concept Introduction:

Co-ordination compounds exhibit structural isomerism and stereoisomerism. Stereoisomerism deals with three dimensional spatial arrangements of atoms or groups of a molecule. There are two types of stereoisomerism – Geometric isomerism and optical isomerism.

A cis isomer has two same ligands lying adjacent to each other whereas a trans isomer has two same ligands lying opposite to each other.

In optical isomerism the isomer that rotates the plane of the polarized light in clockwise direction is termed as d-isomer and the isomer rotates the plane of the polarized light in anti-clockwise direction is l-isomer. These isomers are called optical isomers and they are non-superimposable mirror images.

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