1.

Draw the structure and write down the IUPAC name for the isomerism exhibited by the molecular formulae. (i) C_(5)H_(12)-Pentane (3isomers) (ii) C_(6)H_(14)-Hexane(5isomers)

Answer»

Solution :`(i) C_(5)H_(10)`
`(a) CH_(3)-CH_(2)-CH_(2)-CH_(2)-CH_(3) to n` PENTANE
`(b) CH_(3)-CH_(2)-underset(2-"methyl"-1-"but"-1"are")underset(CH_(3))underset(|)(CH)-CH_(2)`
`(c ) CH_(3)-overset(CH_(3))overset(|)underset(CH_(3))underset(|)(C )-CH_(3)to2`, `2`-Dimethyl propane
`(ii) C_(6)H_(14)`
`(a) underset(n-"hexane")(CH_(3)-CH_(2))-CH_(2)-CH_(2)-CH_(2)-CH_(3)to`
`(b) underset("pentane")(CH_(3)-underset(CH_(3))underset(|)(C )H)-CH_(2)-CH_(2)-CH_(3)to"Methyl"`
`(c ) underset(3"Methyl pentane")(CH_(3)-CH_(2)-CH)-CH-CH-CH_(2)-CH_(3)to`
`(d) CH_(3)-overset(CH_(3))overset(|)underset(CH_(3))underset(|)(C )-CH_(2)-CH_(3)to2"methyl pentane"`
`(e) CH_(3)-underset(CH_(3))underset(|)(C )H-underset(CH_(3))underset(|)(C )H-CH_(3)to2,2- "dimethyl"`
butone [These two compounds exhibits constitutional isomerism]


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