An organic compound [A] C2H6O, on heating with conc. H2SO4 at 413K gives a neutral compound [B] C4H10O. Compound [B] on treatment with PCl5 gives a product, which on subsequent treatment with KCN yields compound [C] C3H5N. Compound [C] on hydrolysis gives an acid [D] C3H6O2. Identify the compounds [A], [B], [C] and [D].

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TextNucleophilic Substitution Reactions of HaloalkanesDehydration of AlcoholsPreparation of Carboxylic Acids from Nitriles

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The polarity of C – X bond of alkyl halides is responsible for their nucleophilic substitution, elimination and their reaction with metal atoms to form organometallic compounds. Alkyl halides are prepared by the free radical halogenation of alkanes, addition of halogen acids to alkenes, replacement of – OH group of alcohols with halogens using phosphorus halides, thionyl chloride or halogen acids. Aryl halides are prepared by electrophilic substitution of arenes. Nucleophilic substitution reactions are categorised into SN1 and SN2 on the basis of their kinetic properties. Chirality has a profound role in understanding the SN1 and SN2 mechanism.

CASE_STUDIESNucleophilic Substitution Reactions of HaloalkanesSN1 Mechanism of SubstitutionSN2 Mechanism of Substitution