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ARTS AND SCIENCES.
RESEARCHES ON THE HEXATOMIC COMPOUNDS OF
Presented, Oct. 13, 1874. In the joint memoir of Genth and myself on the ammonia-cobalt bases it was stated that xanthocobalt is not the only product of the action of nitrous acid gas upon ammoniacal solutions of cobalt. A further investigation of this and other related subjects was then promised. I propose now to resume the study of this class of compounds from the standpoint of the chemistry of the present day. The progress of science has rendered necessary the abandonment of my former theoretical views, as well as the adoption of the new notation. It has also, as I shall endeavor to show, lent a peculiar interest to the study of the ammoniametallic bases.
In studying the action of the alkaline nitrites upon salts of cobalt, or upon those of the different series of ammonia-cobalt compounds, a principal difficulty arises from the varying nature and relative proportions of the products obtained under various conditions of temperature, concentration of solutions employed, and duration of action. I have endeavored to cover the whole ground as completely as possible.
1. Action of Ammonia and Ammonic Nitrite upon a Solution of Cobaltic Chloride and Ammonic Nitrate. — When a warm solution of
* Being Part II. of Researches on the Ammonia-cobalt Bases, by Wolcott Gibbs and F. A. Genth.
VOL. X. (n. 8. 11.)