Question

Is there any trick to find number of structural isomers in a molecular formula?

Answer 1

HEYAAA.....

HERE'S YOUR ANSWER.....
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Yes...there is a trick to find out the number of structural isomer possible by its molecular formula.

You can find out by seeing the number of carbon atom...
If it have 1,2 or 3 carbon atom then no structural isomer can be possible.
If it have...

4 carbon atom.....then 1 isomer possible.
5 carbon atom..... then 2 isomer possible.
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.
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and so on...
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HOPE THIS HELPS

Answer 2

Answer:

For unsymmetric molecules

Stereo isomers 2^n

For symmetric molecules

Isomers are 2^2-2^n/2-n

Explanation: