Nature of the 2-, 3-, 4-cyanopyridine, 3-Aminocrotononitrile (cas 1118-61-2), and 3-aminobutyronitrile complexes of copper(I) in propylene carbonate

Add time:09/09/2019    Source:sciencedirect.com

The stoichiometry, stability, and mode of coordination of the 2-, 3-, 4-cyanopyridine, 3-aminocrotononitrile, and 3-aminobutyronitrile complexes of copper(I) in propylene carbonate were investigated by polarography, potentiometry, and infrared spectroscopy. No evidence for the formation of the 1:1 complexes was observed. 2-Cyanopyridine, 3-cyanopyridine, and 3-aminobutyronitrile form 2:1 complexes, while 4-cyanopyridine and 3-aminocrotononitrile form 2:1 and 3:1 complexes over the range of copper(I) and ligand concentrations examined. The cyanopyridines are coordinated to copper(I) ion through the pyridine nitrogen, and the two aminonitriles are coordinated through the amine nitrogen.

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