Question

The number of structural isomers for the compound with molecular formula $ {C_4}{H_6} $ is:
1. 3
2. 7
3. 5
4. 9

Answer 1

Hint: To solve this question, first we will name the isomers for the compound $ {C_4}{H_6} $ . And, then we will describe the few isomers one-by-one. We will also mention the isomers which is not structural.

Complete step by step solution:
There are a total 9 structural isomers for the compound with molecular formula $ {C_4}{H_6} $ .
Some of them are $ 1 - butyne $ , $ 2 - butyne $ , $ 1,2 - butadiene $ , $ 1,3 - butadiene $ and $ cyclobutene $ .
Other isomers with this formula include $ methylenecyclopropane $ , $ 1 - methylcyclopropene $ , $ 3 - methylcyclopropene $ and $ bicyclo[1.1.0]bu\tan e $ .
 $ * $ $ 1 - butyne $ : $ 1 - Butyne $ puts the triple bond on the terminal carbon, permitting a hydrogen to be accessible. Normally on the off chance that we essentially allude to Butyne we are alluding to since when there is definitely not a number recognizing where the alkyne is we expect it is on the main carbon. It is also known as $ But - 1 - yne $ and $ Ethyl{\text{ }}acetylene $ .
 $ * $ $ 2 - butyne $ : $ 2 - butyne $ is an alkyne with chemical formula $ C{H_3}C \equiv CC{H_3} $ . Produced artificially, it is a colorless, volatile, pungent liquid at standard temperature and pressure.
 $ * $ $ 1,2 - butadiene $ : $ 1,2 - Butadiene $ is a minor side-effect in the creation of $ 1,3 - butadiene $ . Thus, the creation and utilization of $ 1,3 - butadiene $ in the production of polymers, for example, manufactured elastic plastics and pitches may bring about the arrival of $ 1,2 - butadiene $ to the climate through different waste streams.
 $ * $ Cyclobutene: Cyclobutene is a cycloalkene. It is of interest as a fundamental value, not for practical applications. It is a colorless easily condensed gas. A modern synthesis involves the 2-step dehydration of cyclobutanol.
Hence, the correct option is (4.) 9

Note:
In science, a structural isomer (or sacred isomer in the IUPAC terminology) of a compound is another compound whose particle has a similar number of molecules of every component, except with legitimately particular connections between them.