Question

Possible structures for C5H12.

Answer 1

Thanks for asking me to answer this question.

A good place to start is to calculate the degree of unsaturation or D.U. of the compound, you may want to look up for that if you’re unsure what it means. The D.U. in this case is zero. Hence the possible isomers are:

1-n-Pentane (Maximizing the number of carbon atoms in the main chain)
2-Isopentane or 2-methylbutane (Shortening the main chain to four C-atoms and looking for positions to place one methyl group)
3-Neopentane or 2,2-dimethylpropane (Main chain has three carbons in this case)

Answer 2

i hope this is your answer