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NH2

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Originally appearing in Volume V08, Page 290 of the 1911 Encyclopedia Britannica.
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NH2 NH2 _1 L Diorthodiaminodiphenyl, <>—<>,isobtained by the reduction of the corresponding nitro See also:

compound (obtained by the See also:action of See also:ethyl nitrite at o C. on metadinitrobenzidine hydrochloride). Its tetrazo compound on reduction gives a See also:hydrazine which, on warming with hydrochloric See also:acid at 15o° C., decomposes into ammonium N = N chloride and, phenazone,<>—<_> (C12H2N2). One of the most important derivatives of See also:diphenyl, from the theoretical point of view, is diphenic acid or diorthodiphenyl carboxylic acid, which can be obtained from diparadiaminodiphenyldiorthocarboxylic acid, H1N >j—.<I > NH2, or from phenanthrene (q.v.), the consti-. HOO COOH tution of which it determines. See BENZInMNE for diparadiaminodiphenyl.

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