C6H4C CH NH •NHNHz Cli.000H = 0211402 +C7H6N2 . It has also been obtained by
See also:heating ortho-diazoaminotoluene with acetic acid and
See also:benzene (F . Heusler, Ber., 1891, 24, p . 4161) . C'H4<NHN NHC7H,=C7H7NI-i 1-c 2 . It crystallizes in needles (from hot
See also:water), which melt at 146.5° C. and
See also:boil at 269°-270 C . It is readily soluble in hot water,
See also:alcohol and dilute hydrochloric acid . Nitrous acid converts it into nitrosoindazole; whilst on heating with the alkyl iodides \/NH ?N . These Isomers are called isindazoles, and may \/\CHI be prepared by the reduction of the nitroso-ortho-alkylaminoacetophenones with
See also:zinc dust and water or acetic acid . ' The
See also:indazoles are weak bases, which crystallize readily . Phenyl indazole, on reduction with sodium and absolute alcohol, gives a dihydro derivative (K . L .
Paal, Ber., 1891, 24, p . 963) . For other derivatives, see E.`Fischer and J . Tafel,
See also:Ann . 1885, 227, P . 314 .
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