Question

Structure of 4-phenylbut-1-ene

Answer 1

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$\huge\red\bold{4_Phenylbut_1_ene }$



》 It is a butene and double bond is at carbon 1 as is mention it is but-1-ene .

》 4-Phenyl means that a phenyl group is attached at Carbon 4 of butene .

》 Pheyl is benzene just one hydrogen is less its formula is C6H5

》 Here in this structure Phenyl is substituent , So ; Numbering of Chain will be started from side where Carbon having double bond gets lowest possible number .

》 Remember : While numbering ; Double , Triple bonds are given preference over substituents

》》》 Now for its structure plz Refer attachment

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Answer 2

$\textbf{\large{Answer -}}$

Refer to the attachment for structure.

Formula - $C_{10}H_{12}$

Explanation -

》Phenyl group is present on the fourth carbon.

》In total, there are four carbon in the principal carbon chain.

》Carbon - carbon double bond is present on the first carbon.

》Starting counting from the right side we get the structure of 4-phenyl-but-1-ene.