The number of structural and configurational isomers of a bromo compound, C_(5)H_(9)Br, formed by the additionn of HBr to 2-penthyne respectively are

The number of structural and configurational isomers of a bromo compou

1.	The number of structural and configurational isomers of a bromo compound, C_(5)H_(9)Br, formed by the additionn of HBr to 2-penthyne respectively are
Answer» 1 and 2 2 and 4 4 and 2 2 and 1 Solution :ADDITION of HBr to 2-pentyne gives two STRUCTURAL isomers (I) and (II). `CH_(3)-C-=C-CH_(2)CH_(3) OVERSET(HBr) underset((I))(CH_(3)C(Br)=CHCH_(2)CH_(3))+underset((II))(CH_(3)CH=C(Br)CH_(2)CH_(3))` Each one of these will EXIST as a PAIR of geometrical isomers as shown below: thus, there are two structural and four configurational isomers.