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13.9     Give the structures of A, B and C in the following reactions:

                   (iii) CH_{3}CH_{2}Br\xrightarrow[]{KCN}A\xrightarrow[]{LiAlH_{4}}B\xrightarrow[0^{\circ}C]{HNO_{2}}C

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The structure of A, B, C are respectively CH_{3}CH_{2}CN,CH_{3}CH_{2}CH_{2}NH_{2} and CH_{3}CH_{2}CH_{2}OH

In the first reaction, the bromine is replaced by cyanide molecule (CN) and after a reduction by LiAlH_{4}  the CN, molecules become CH_{2}NH_{2}.

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