NH2  NH2 _1 L Diorthodiaminodiphenyl, <>—<>,isobtained by the reduction of the corresponding nitro See also:

• COMPOUND
• COMPOUND (from Lat. componere, to combine or put together)

compound (obtained by the See also:

• ACTION

action of See also:

• ETHYL

ethyl nitrite at o C. on metadinitrobenzidine hydrochloride) . Its tetrazo compound on reduction gives a See also:

• HYDRAZINE (DIAMIDOGEN), N2H4

hydrazine which, on warming with hydrochloric See also:

• ACID (from the Lat. root ac-, sharp; acere, to be sour)

acid at 15o° C., decomposes into ammonium N = N chloride and, phenazone,<>—<_> (C12H2N2) . One of the most important derivatives of See also:

• DIPHENYL (phenyl benzene), C6H5

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 .