11th Class Chemistry Hydrocarbons

  • question_answer 1) Write the structures of different chain isomers of alkanes corresponding to the molecular formula, \[{{C}_{6}}{{H}_{14}}\]. Also write their IUPAC names.

    Answer:

    Five, i.e., (i) \[C{{H}_{3}}C{{H}_{2}}\underset{Hexane\,(n-Hexane)}{\mathop{C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}}}\,C{{H}_{3}}\] (ii) \[C{{H}_{3}}-\underset{\underset{\underset{\text{2-Methylpentane}\,\text{(Isohexane)}}{\mathop{\text{C}{{\text{H}}_{\text{3}}}}}\,}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\mathop{CH}}\,-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}\] (iii)\[C{{H}_{3}}-C{{H}_{2}}-\underset{\underset{\underset{3-\text{Methylpentance}}{\mathop{\text{C}{{\text{H}}_{\text{3}}}}}\,}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\mathop{CH}}\,-C{{H}_{2}}-C{{H}_{3}}\] (iv) \[C{{H}_{3}}-\underset{2-3-\text{Dimethylbutane}}{\mathop{\underset{\underset{\text{C}{{\text{H}}_{\text{3}}}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\mathop{CH}}\,-\underset{\underset{\text{C}{{\text{H}}_{\text{3}}}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\mathop{CH}}\,}}\,-C{{H}_{3}}\] (v) \[C{{H}_{3}}-\underset{\underset{\underset{2,2-\text{Dimethylbutane}\,(Neohexane)}{\mathop{\text{C}{{\text{H}}_{\text{3}}}}}\,}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\overset{\overset{\text{C}{{\text{H}}_{\text{3}}}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\mathop{C}}}\,-C{{H}_{2}}-C{{H}_{3}}\]  


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