Abstract

The Authors analyzed and interpreted the infrared spectrum of ferro - and ferricyanide, of cromicyanide and of the complex cyanides of mono, bi and trivalent manganese. They showed the great influence of the oxydation state of the metal on CN and Me-C stretching vibrations. The Cr( CN) 6 −3 complex has been studied more throughly on the basis of its analogy with Cr( CO) 6, the model being the isolated molecule. Thus, it is considered as pertaining to the O h simmetry group, without taking into account the degenerating elimination because of the crystal field. This way the Authors succeeded in calculating the cromicyanide force constants.

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