Which from following structures represents 1,3 butadiene ?

Step-by-step solution

The IUPAC name 1,3-butadiene corresponds to a four-carbon chain with two double bonds located at the 1st and 3rd carbon atoms. The chemical formula is CH₂=CH-CH=CH₂ . Let us analyze the given bond-line structures: 1. The first structure has a five-carbon chain with one double bond at the second position, representing pent-2-ene. 2. The second structure has a four-carbon chain with double bonds at the first and third positions, representing 1,3-butadiene. 3. The third structure has a four-carbon chain with a triple