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

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.