An allylide on hydrolysis gives allylene. The alkaline earth metal cation of allylide dissolves in dry ether in the presence of alkyl halide to form Grignard reagent. The allylide is :

M g_{2} C_{3}

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C e_{2} C_{3}

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M n C_{2}

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M g B r_{2}

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Solution

The correct option is A $M g_{2} C_{3}$
Grignard reagent is formed by $M g$ . $M g_{2} C_{3}$ produces propylene or reacting with water. Hence $M g_{2} C_{3}$ is the allylide.

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