what are isomers? what are the conditions for isomerism?
Isomers: Two or more compounds which have same chemical formula but different arrangement of atoms are called isomers.
For example: pentane with C5H12 exists in the following three forms.
Molecular formula of pentane is C5H12. The possible structural isomers are:
(i) CH3CH2CH2 CH2CH3
Normal or n-pentane
(ii) CH3CH2CH( CH3)CH3
(iii) CH3C( CH3)2CH3
Conditions for Isomerism:
a. Only alkanes with more than three carbon atoms can have isomers.
b. The side chains cannot be present on the terminal carbons.
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