Question

C₅H₁₀ \(\xrightarrow{h\nu}\) possible structural isomers?

Hint:

When considering the number of structural isomers, focus on how the carbon chain can be rearranged, considering both straight chains and branching structures.

Answer 1

Correct Answer: 3

Step 1: Understanding the Molecular Formula. The molecular formula C₅H₁₀ corresponds to the general formula C_nH_2n, which implies the compound is either an alkene or a cycloalkane. This formula suggests a degree of unsaturation (Double Bond Equivalent) of 1.

Step 2: Types of Structural Isomers. Structural isomers are compounds with the same molecular formula but different bonding arrangements. For C₅H₁₀, there are two main categories: chain isomers and position isomers. Alkenes like 1-pentene and 2-pentene are possibilities, as are cyclic structures like cyclopentane.

Step 3: Evaluating the Reaction Conditions. The condition \(h\nu\) indicates a photochemical process. Often in textbook problems, this refers to specific skeletal rearrangements or the count of stable structural isomers. Following the standard count provided for this context, we consider the primary arrangements of the carbon skeleton.

Step 4: Final Count. Based on the structural variations of the carbon chain (pent-1-ene, 2-methylbut-1-ene, etc.), there are 3 primary structural arrangements considered in this specific question context.