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NEET Chemistry Haloalkanes and Haloarenes / हैलोएल्केन तथा हैलोएरीन्स Question Bank Self Evaluation Test - Haloalkanes and Haloarenes

  • question_answer
    The missing reagents \[{{R}_{1}}\] and \[{{R}_{2}}\] in the following series of reactions are   \[C{{H}_{3}}C{{H}_{2}}Br\xrightarrow{{{R}_{1}}}[\,\,\,\,]\xrightarrow{{{R}_{2}}}C{{H}_{3}}\overset{-}{\mathop{C}}\,H{{P}^{+}}P{{h}_{3}}\]

    A) PhLi and \[P{{h}_{3}}P\] respectively

    B) \[P{{h}_{3}}P\] and PhLi respectively

    C) \[P{{h}_{3}}P\] and \[{{C}_{2}}{{H}_{5}}ONa\] respectively

    D) Either [b] or [c]

    Correct Answer: D

    Solution :

    [d] \[C{{H}_{3}}C{{H}_{2}}Br+P{{h}_{3}}P\xrightarrow{{}}C{{H}_{3}}C{{H}_{2}}{{P}^{+}}P{{h}_{3}}B{{r}^{-}}\xrightarrow[{{C}_{2}}{{H}_{5}}ONa]{{{C}_{6}}{{H}_{5}}Li\,or}\]\[C{{H}_{3}}CH=PP{{h}_{3}}\overset{{}}{\longleftrightarrow}C{{H}_{3}}\overset{-}{\mathop{C}}\,H\overset{+}{\mathop{P}}\,P{{h}_{3}}\]


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