What gas is quantitatively liberated when ethylmagnesium bromide () reacts with terminal alkynes or heavy water ()?

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Question

What gas is quantitatively liberated when ethylmagnesium bromide ($C_2H_5MgBr$) reacts with terminal alkynes or heavy water ($D_2O$)?

Prashant Kotian · Accepted Answer

Correct answer: A. Grignard reagents extract active protons (or deuterons) to form the alkane corresponding to their alkyl group. Ethylmagnesium bromide strictly yields ethane or mono-deuteroethane.

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