11th Class Chemistry Hydrocarbons

  • question_answer 4) Write structural formulas of the following compounds : (i) 3, 4, 4, 5-Tetramethylheptane (ii) 2, 5-Dimethylhexane

    Answer:

    The expanded structures of these alkanes are: (i) \[\overset{1}{\mathop{C}}\,{{H}_{3}}-\overset{2}{\mathop{C}}\,{{H}_{2}}-\underset{3,4,4,5-\text{Tetramethylheptane}}{\mathop{\underset{\underset{\text{C}{{\text{H}}_{\text{3}}}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\mathop{\overset{3}{\mathop{C}}\,}}\,H-{{\,}^{4}}\underset{\underset{\text{C}{{\text{H}}_{\text{3}}}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\overset{\overset{\text{C}{{\text{H}}_{\text{3}}}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\mathop{C}}}\,-\underset{\underset{\text{C}{{\text{H}}_{\text{3}}}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\mathop{\overset{5}{\mathop{C}}\,}}\,H}}\,-\overset{6}{\mathop{C}}\,{{H}_{2}}-\overset{7}{\mathop{C}}\,{{H}_{3}}\] (ii) \[\overset{1}{\mathop{C}}\,{{H}_{3}}-\underset{2,5-Dimethylhexane}{\mathop{\underset{\underset{\text{C}{{\text{H}}_{\text{3}}}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\mathop{\overset{2}{\mathop{C}}\,}}\,H-\overset{3}{\mathop{C}}\,{{H}_{2}}-\overset{4}{\mathop{C}}\,{{H}_{2}}-\underset{\underset{\text{C}{{\text{H}}_{\text{3}}}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\overset{5}{\mathop{C}}}\,H}}\,-\overset{6}{\mathop{C}}\,{{H}_{3}}\]  


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