11th Class Chemistry Hydrocarbons

  • question_answer 2) Write structures of different isomeric alkyl groups corresponding to the molecular formula \[{{C}_{5}}{{H}_{11}}\]Write IUPAC names of alcohols obtained by the attachment of OH groups at different carbons of the chain.

    Answer:

        Structure of \[{{\mathbf{C}}_{\mathbf{5}}}{{\mathbf{H}}_{\mathbf{11}}}\]alkyl group IUPAC names of the corresponding alcohols (i) \[C{{H}_{3}}-C{{H}_{2}}-\underset{1-Pentyl}{\mathop{C{{H}_{2}}}}\,-C{{H}_{2}}-C{{H}_{2}}-\] \[C{{H}_{3}}-C{{H}_{2}}-\underset{Penran\,-1-\text{ol}}{\mathop{C{{H}_{2}}-C{{H}_{2}}}}\,-C{{H}_{2}}-OH\] (ii) \[C{{H}_{3}}-\underset{\underset{2-Pentyl}{\mathop{|}}\,}{\mathop{CH}}\,-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}\] \[\underset{\text{Pentan}\,-2-ol}{\mathop{C{{H}_{3}}-\underset{\underset{OH}{\mathop{|}}\,}{\mathop{CH}}\,-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}}}\,\] (iii) \[C{{H}_{3}}-C{{H}_{2}}-\underset{\underset{3-Pentyl}{\mathop{|}}\,}{\mathop{CH}}\,-C{{H}_{2}}-C{{H}_{3}}\] \[C{{H}_{3}}-C{{H}_{2}}-\underset{\underset{Pen\tan -3-ol}{\mathop{\begin{smallmatrix} | \\ OH \end{smallmatrix}}}\,}{\mathop{CH}}\,-C{{H}_{2}}-C{{H}_{3}}\] (iv) \[C{{H}_{3}}-\underset{\underset{3-Methyl\,-1-butyl}{\mathop{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}}\,}{\mathop{CH}}\,-C{{H}_{2}}-C{{H}_{3}}\] \[C{{H}_{3}}-\underset{\underset{\underset{3-Methylbu\tan -1-ol}{\mathop{C{{H}_{3}}}}\,}{\mathop{|}}\,}{\mathop{CH}}\,-C{{H}_{2}}-C{{H}_{2}}-OH\] (v) \[C{{H}_{3}}-C{{H}_{2}}-\underset{\underset{\underset{20Methyl-1-butyl}{\mathop{\text{C}{{\text{H}}_{\text{3}}}}}\,}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\mathop{CH}}\,-C{{H}_{2}}-\] \[C{{H}_{3}}-C{{H}_{2}}-\underset{\underset{\underset{3-Methylbu\tan -1-ol}{\mathop{C{{H}_{3}}}}\,}{\mathop{|}}\,}{\mathop{CH}}\,-C{{H}_{2}}-OH\] (vi) \[C{{H}_{3}}-\underset{\underset{2-Methyl-2-butyl}{\mathop{|}}\,}{\overset{\overset{C{{H}_{3}}}{\mathop{|}}\,}{\mathop{C}}}\,-C{{H}_{2}}-C{{H}_{3}}\] \[C{{H}_{3}}-\underset{\underset{\underset{2-Methyl-2-butyl}{\mathop{OH}}\,}{\mathop{|}}\,}{\overset{\overset{C{{H}_{3}}}{\mathop{|}}\,}{\mathop{C}}}\,-C{{H}_{2}}-C{{H}_{3}}\] (vii) \[C{{H}_{3}}-\underset{\underset{\underset{3-Methyl-2-butyl}{\mathop{\text{C}{{\text{H}}_{\text{3}}}}}\,}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\mathop{CH}}\,-\underset{|}{\mathop{CH}}\,-C{{H}_{3}}\] \[C{{H}_{3}}-\underset{3-\text{Methylbutan}\,\text{-2-ol}}{\mathop{\underset{\underset{\text{C}{{\text{H}}_{\text{3}}}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\mathop{CH}}\,-\underset{\underset{\text{OH}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\mathop{CH}}\,}}\,-C{{H}_{3}}\] (viii) \[\underset{2,2-Dimethyl-1-propyl}{\mathop{C{{H}_{3}}-\underset{\underset{\text{C}{{\text{H}}_{\text{3}}}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\overset{\overset{\text{C}{{\text{H}}_{\text{3}}}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\mathop{C}}}\,-C{{H}_{2}}-}}\,\] \[\underset{2,2-Dimethylpropan-1-ol}{\mathop{C{{H}_{3}}-\underset{\underset{\text{C}{{\text{H}}_{\text{3}}}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\overset{\overset{\text{C}{{\text{H}}_{\text{3}}}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\mathop{C}}}\,-C{{H}_{2}}-}}\,OH\]  


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