Structure and stereo isomerism

Isomers are compounds with different physical and chemical properties but the same molecular formula. In organic chemistry, there are many cases of isomerism. For example, the formula C4H10represents both butane and 2‐methylpropane.

These are examples of structural isomers, or constitutional isomers.Structural isomers have the same molecular formula but a different bonding arrangement among the atoms.

Stereoisomers are isomeric molecules that have the same molecular formula and sequence of bonded atoms (constitution), but differ in the three-dimensional orientations of their atoms in space.

Two or more different compounds having the same formula are called isomers. Two principal types of isomerism are known among coordination compounds. Each of which can be further subdivided.


  • a) Geometrical isomerism
  • b) Optical isomerism
  • Structural Isomerism

    a) Coordination isomerism

    b) Ionisation isomerism

    c) Hydrate isomerism

    d) Linkage isomerism