What is the number of structural isomers possible for alkene with molecular formula C ₅ H ₁₀ ?

Step-by-step solution

The degree of unsaturation for C ₅ H ₁₀ is determined by the formula DU = x + 1 - y 2 where x = 5 and y = 10 . Substituting gives DU = 5 + 1 - 10 2 = 1 , indicating one double bond. Structural isomers with one carbon-carbon double bond and molecular formula C ₅ H ₁₀ are enumerated based on chain length and branching. The straight-chain isomers include pent-1-ene, CH ₂= CH - CH ₂- CH ₂- CH ₃ , and pent-2-ene, CH ₃- CH = CH - CH ₂- CH ₃ . Branched-chain isomers are derived from butene with methyl substitution: 2-meth