JEE CHEMISTRY MCQ: HALOALKANES AND HALO ARENES

1 Medium

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Analyzing +4 | -1

Out of following in which retention of configuration in product

?

will take
place?

View answer and explanation

Correct option: A

C{H_3} - \mathop {CH}\limits_{\begin{array}{cccccccccccccccccccc} | \\ {{C_2}{H_5}} \end{array}} - OH\xrightarrow[{Py}]{{SOC{l_2}}}\xrightarrow[{{\text{Acetone}}}]{{NaI}}P

Option A is correct because the reaction with

SOCl_2

in the presence of pyridine leads to inversion, and the subsequent reaction with NaI in acetone leads to another inversion, resulting in overall retention of configuration.

More Questions from HALOALKANES AND HALO ARENES

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An alkyl halide reacts with metallic sodium in dry ether. The reaction is known as : In electrophilic substitution reaction of chlorobenzene, the chloro group: Which of the followings statements is/are incorrect? Polymerization of alkenes takes place through Assertion (A): The boiling points of alkyl halides decrease in the order:

RI > {R B r} > {R C I} > {R F}

.

Reason (R): The boiling points of alkyl chlorides, bromides and iodides are considerably higher than that of the hydrocarbon of comparable molecular mass. Friedel-Craft’s reaction of bromobenzene with methyl iodide gives: