11th Class Chemistry Organic Chemistry: Some Basic Principles & Techniques Question Bank 11th CBSE Chemistry Organic Chemistry: Some Basic Principles & Techniques

  • question_answer Higher alkyl substituted alkene is formed in greater proportion than the lower alkyl substituted alkene. Justify.

    Answer:

                    In alkyl substituted alkene, the \[\alpha \]-hydrogen atoms of the methyl group are involved in the hyper conjugation with the pi\[(\pi )\] electron pair of the double bond. As a result, the stability of alkene increases. Greater the number of such groups more will be the stability of alkene. Thus, the relative order of stability of the following alkenes is: \[\underset{\text{But-2-ene}}{\mathop{C{{H}_{3}}-CH}}\,=CH-C{{H}_{3}}>\underset{\text{Propene}}{\mathop{C{{H}_{3}}}}\,-CH\]\[=C{{H}_{2}}>\underset{\text{Ethene}}{\mathop{C{{H}_{2}}}}\,=C{{H}_{2}}\]


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