Predict R 1- A and R 2 respectively in the given reaction-CH 3- CH 2- Cl R 1- A R 2- CH 3- CH 3A- Alc- KOH- ethene- H 2 - PdB- Zn- ethene- Na-liq- NH 3C- Alc- KOH- ethyne- N a - liq - N H 3D- Zn- ethene- H 2 - P d

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Dehydrohalogenation for Alkenes

Predict R 1, ...

Question

Predict $R_{1}$ , A and $R_{2}$ respectively in the given reaction:
$C H_{3} - C H_{2} - C l R_{1} - \to A R_{2} - \to C H_{3} - C H_{3}$

Alc. KOH, ethene,

H_{2} / P d

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Zn, ethene,

N a / l i q . N H_{3}

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Alc. KOH, ethyne,

N a / l i q . N H_{3}

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Zn, ethene,

H_{2} / P d

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Solution

The correct option is A Alc. KOH, ethene, $H_{2} / P d$
Ist reaction is dehydrohalogenation involves removal of (elimination of) a hydrogen chloride by abstracting $β$ -H from a ethyl chloride in presence of base (alc. KOH) to form ethene.
2nd reaction is hydrogenation of ethene in presence of $H_{2} / P d$ to give ethane.
$C H_{3} - C H_{2} - C l a l c . K O H - ----- \to C H_{2} = C H_{2} H_{2} / P d - --- \to C H_{3} - C H_{3}$

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Dehydrohalogenation for Alkenes

Standard XII Chemistry

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Predict R1, A and R2 respectively in the given reaction: CH3−CH2−ClR1−→AR2−→CH3−CH3

Predict $R_{1}$ , A and $R_{2}$ respectively in the given reaction:
$C H_{3} - C H_{2} - C l R_{1} - \to A R_{2} - \to C H_{3} - C H_{3}$