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Discuss isomerism in alkynes. |
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Answer» Solution :(a) Chain isomerism: The ISOMERS differ in the arrangement of carbon atoms in parent chain. `CH_(3) underset("pent - 1 - yne")(CH_(2)CH_(2))C equiv CH CH_(3)-underset(3 - "METHYL But- 1 - yne")overset(CH_(3))overset(|)(CH) - C equiv CH` (B) Position isomerism : it is due to the difference in position of tirple bond in carbon chain. Ex: ` CH_(3) - underset("But-1-yne")(CH_(2)) - C equiv CH "" CH_(3) - underset("But-2-yne")(C equiv C) - CH_(3)` FUNCTIONAL isomerism: - Here alkynes and diene are function isomers. Because both have same molecular formula. Ex: `CH_(3) - underset(2-"Propyne")(C equiv C) - CH_(3) "" underset("ptop-1,2- diene(allene)") (CH_(2) = C = CH_(2))` |
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