Question

Which type of isomerism does this complex ${\left[ {Co{{\left( {en} \right)}_3}} \right]^{3 + }}$ exhibit?

Answer 1

Hint : The IUPAC name of this compound is Tris (ethylene-di-amine) cobalt. Now to answer this question we should know the important things about isomerism. There are so many isomers and each isomerism has its own properties and its own functions. So you should have proper knowledge of all the isomerism.

Complete Step By Step Answer:
The complex ${\left[ {Co{{\left( {en} \right)}_3}} \right]^{3 + }}$ given in the question exhibits a type of optical isomerism. We know that when the complex has the same molecular formula, but has the different arrangement of the atoms in space, then these are known as isomers. Due to the effect of isomers on the plane polarized light these isomers are named as optical isomers. Optical isomerism is a form or type of stereoisomerism. The simple substances which show optical isomerism, they exist as two isomers and they both together are known as enantiomers. A solution of one enantiomer which rotates the plane of polarization in a clockwise direction is known as (+) form enantiomer and a solution of other enantiomer which rotates the plane of polarization in an anti-clockwise direction is known as (-) form enantiomer. When the equal mixture of two enantiomers are present in a solution then this mixture is known as a racemic mixture.

Note :
Isomers usually have different physical and chemical properties. There are many other types of isomerism such as structural isomerism, ionization isomerism, coordination isomerism, linkage isomerization, geometric isomerism, planar isomers. Geometrical isomers contain cis isomers and trans isomers.