Question

How to tell how many structural isomers are possible for a compound?

Answer 1

There are three structural isomers for pentane. There are five possible structural isomers for hexane. There are nine structural isomers for heptane. As you increase the number of carbons which are being used in a compound you continue to increase the number of structural isomers that can exist.

Answer 2

Answer:

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Structural Or Constitutional Isomers

With the structural formula C4H10 there are two different isomers possible. As the number of Carbons in an alkane increases, the number of structural isomers also increases.