Platinic salts, ammino-derivatives

Ammino-derivatives of Auric Salts and Oxides.—Auric chloride, like platinic chloride, combines with hydrochloric acid and alkali chlorides with formation of ehlorauric acid, HAuC14, and alkali chlor-... 

Ammino-derivatives of the unstable palladic salts are unknown, but a series of compounds have been prepared where pyridine takes the place of ammonia in the complex, and these appear to be derivatives of palladic salts. Unlike the platinic salts, however, the co-ordination number in these substances is four instead of six. 

Platinum forms both platinous and platinie salts, in which the metal is divalent and tetravalent respectively. Both series of salts are capable of uniting with ammonia, forming complex ammines. The co-ordination number in the platinous series is four and in the platinie series six. The latter series correspond in many respects to the chromic and cobaltic ammino-salts, but as the metal is tetravalent, the maximum number of radicles outside the complex is four instead of three. Also, the ammino-bases from which the salts are derived are much more stable than those of chromium or cobalt. 

Ammino-derivatives of Platinum Salts—Derivatives of Platinous Salts— Derivatives of Platinio Saits—Derivatives containing Hydroxylamine and Hydrazine in place of Ammonia—Symmetrical and Asymmetrical Compounds—Diplato-animino-salts—Diplati-ammino-salts. 

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