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Investigation of the reaction of cobalt(II) bromide with nitrogen containing compounds in acetic acid

M. Hronec, R. Prikryl, and V. Veselý

Department of Chemistry and Technology of Petroleum, Slovak Technical University, 880 37 Bratislava

 

Abstract:  The reactions of cobalt(II) bromide with nitrogen containing compounds in acetic acid were examined at 20, 60, and 90°C by means of the conductivi­ty and spectroscopic measurements. In the reactions of СоВr2 with pyridine, N,N-diethylaniline or w-hexylamine the conductivity minimum was observ­ed at equimolar concentrations, whilst with ethylenediamine, hexamethylenediamine, and ( —)-lysine at a 2 : 1 molar ratio of СoВr2 to amine. In both cases the minimum was due to the formation of little soluble ion complexes [СoВr4]2- with the nitrogen containing compounds. Triethanolamine and aminoacetic acid reacted with cobalt(II) bromide in a 2 : 1 ratio yielding predominantly ammonium bromide salts. N-Acetylated amines, anthranilic acid, p-nitroaniline, and diphenylamine failed to react with cobalt(II) bromide in the investigated temperature range.

Full paper in Portable Document Format: 294a440.pdf

 

Chemical Papers 29 (4) 440–448 (1975)

Tuesday, April 16, 2024

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