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ISC Class XII Notes 2019 : Chemistry

7 pages, 16 questions, 0 questions with responses, 0 total responses,

Mohammed Malik Sharaf
Holy Innocents High School (HIHS), Wellington

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SOLVING PROBLEMS BASED ON ORGANIC CONVERSIONS IN SUBTLEST WAYS AND SHORTEST POSSIBLE TIME Presented By:Lokesh suredia PGT(Chemistry) KV SAC Vastrapur (Ahemdabad) INTRODUCTION : Students memorise all organic reactions but unable to rearrange all these reactions and solve problems based on organic conversions. This is an effort to systematize and rearrange the organic reactions to solve problems based on organic conversions. METHOD:- Organic conversions are classified as:A. Aliphatic conversions. B. Aromatic conversions (A) ALIPHATIC CONVERSIONS: Aliphatic conversions further classified as Step-up conversions (i) By Wurtz reaction: Na RX R R (ii) Through cyanide: RX KCN R CN (iii) Through Grignard reagent: Mg C O RX RMgX C (iv) Through Alkyne: HC C Na RX H C C R (b) OH R Step-down conversions (i) Through carboxylic acid: RCOOH NaOH CaO RH (ii) By Hofmann bromamide reaction: KOH RCONH 2 Br 2 R NH 2 KEY FOR CONVERSIONS (By Lokesh Suredia) Sl Reagent No Group Out Group In Remark

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