The number of structural and configurationalm isomers of a bromo compound, C5H9Br, formed by the addition of HBr to 2-pentyne respectively are

Question

The number of structural and configurationalm isomers of a bromo compound, C5H9Br, formed by the addition of HBr to 2-pentyne respectively are (A) 1 and 2 (B) 2 and 4 (C) 4 and 2 (D) 2 and 1

Tardigrade Admin · Accepted Answer

Addition of HBr of 2-pentyne gives two structural isomers (I) and (II) CH3 - C ≡ C- CH2CH3 xrightarrowHBr underset text(I)CH3C(Br) = CHCH2CH3 + underset text(II)CH3CH = C(Br)CH2CH3Each one of these will exist as a pair of geometrical isomers. Thus, there are two structural and four configurational isomers.

Q. The number of structural and configurationalm isomers of a bromo compound, C5​H9​Br, formed by the addition of HBr to 2-pentyne respectively are

1 and 2

2 and 4

4 and 2

2 and 1

Addition of HBr of 2-pentyne gives two structural isomers (I) and (II) CH3​−C≡C−CH2​CH3​HBr​(I)CH3​C(Br)=CHCH2​CH3​​+(II)CH3​CH=C(Br)CH2​CH3​​Each one of these will exist as a pair of geometrical isomers. Thus, there are two structural and four configurational isomers.

Q. The number of structural and configurationalm isomers of a bromo compound, $C_{5} H_{9} B r$ , formed by the addition of HBr to 2-pentyne respectively are