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Write structure of different isomers corresponding to the 5^(th) member of alkyne serie. Also awrite IUPAC names of all the isomers. What type of isomerism is exhibited by different pairs of isomers ? |
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Answer» Solution :`5^(th)` member of alkyne has the molecular formula `C_(6)H_(10)`. It has seven possible alkaline isomers. The possible isomers are : Position isomers : (i) `underset("Hex-1-yne")(overset(6)(C)H_(3)-overset(5)(C)CH_(2)-overset(4)(C)H_(2)-overset(3)(C)H_(2)-overset(2)(C)-=overset(1)(C)H)` (ii) `underset("Hex-2-yne")(overset(6)(C)H_(3)-overset(5)(C)H_(2)-overset(4)(C)H_(2)-overset(3)(C)-=overset(2)(C)-overset(1)(C)H_(3))` (III) `underset("Hex-3-yne")(overset(1)(C)H_(3)-overset(2)(C)H_(2)-overset(3)(C)-=overset(4)(C)-overset(5)(C)H-overset(6)(C)H_(3))` Chain isomers: (iv) `underset("3-methylpent-1-yne")(H-overset(1)(C)-=overset(2)(C)-overset(3)(C)H_(2)-underset(CH_(3))underset(|)overset(4)(CH)-overset(5)(C)H_(3))` (V) `underset("4-methylpent-1-yne")(Hoverset(1)(C)-=overset(2)(C)-underset(CH_(3))underset(|)overset(3)(CH)-overset(4)(C)H_(2)-overset(5)(C)H_(3))` (vi) `underset("4-methylpent-2-yne")(H_(3)overset(1)-overset(2)(C)-=overset(3)(C)-underset(CH_(3))underset(|)overset(4)(CH)-overset(5)(C)H_(3))` (vii) `underset("3,3-methylbut-1-yne")(H-overset(1)(C)-=overset(2)(C)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-overset(4)(C)H_(3))` Different isomers pairs have position and chain isomers. |
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