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How are the following conversions carried out ? 2-methylbutan-1ol-2methylbutanoic acid Pheylethene into Benzoic acid (3) Benzoic acid into metanitrobenzoic acid What is the action of Benzene sulphonyl chloride on primary, secondary and tertiary amines? Write two uses of formaldehyde. |
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Answer» Solution :(1) 2-methylbutan-1-ol into 2-methylbutanoic acid `CH_(3) CH_(2) CH_(2) (CH_(3)) CH_(2) OH overset([O])(to) CH_(3) CH_(2) CH_(2) (CH_(3)) COOH` (2) PHENYL ethene into Benzoic acid  (3) Benzoic acid into metanitrobenzoic acid.  Benzene sulphonyl chloride is Hinsberg's REAGENT. It reacts with all the amines differently to form sulphonamide which can be used to distinguish between primary, SECONDARY and tertiary amines. Primary aminues react with benzenesulhonyl chloride formaing N-alkyl benzene sulphonamide. It is simply acid base type of reactions. Amine has lone pair of electrons on N, so it acts as base and attacks the electrophilic centre of the reagent that is S atom. Attack of `NH_(2)` helps in removal of `CI^(-)` and the product is sulphonamide. The primary amine sulphonamide is soluble in alkali.  Secondary amines reacts with Benzenesulphonyl chloride FORMING N, N-dialkyl benzene sulphoanmide which is insoluble in alkali.  Tertiary amines do not react with benzenesulphonyl chloride Formaldehyde is regularly used in the chemical medical industries and it has preservative and sterilizing properties. It is also used to treat various types of building materials and in the creation of foam insulation and some types of fabrics. |
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