What are the possible Lewis structures for C3H4, and what are its isomers?

The molecular formula C3H4 can represent several distinct structures, known as isomers. Below are the two major isomers along with their Lewis structures.

1. Propene (C3H6)

Propene is an alkene and has a double bond between the first two carbon atoms. Its Lewis structure is:

   H   H
    \ / 
    C = C
    /   \ 
   H     C
          / 
         H 

2. Cyclopropene

Cyclopropene is a cyclic compound with a double bond. Its Lewis structure is:

       C
      / \
     C   C
      \ / 
       C

These two structures give us insight into the different ways carbon and hydrogen can be arranged to satisfy the valency of carbon atoms and adhere to the molecular formula C3H4. Understanding these isomers and their structures is crucial for studying organic chemistry and the properties of hydrocarbons.