Bidentate Bridged Morpholine Complexes with Zinc(II) and Cadmium(II) Cyanides

Abstract
Coordination compounds formed by zinc(II) and cadmium(II) cyanides with morpholine have been prepared and characterized by infrared spectral measurements down to 200 cm−1 in the solid state. Possible structures for the compounds isolated in the solid state are discussed. Morpholine is shown to act as a terminal N-bonded ligand in the 1:2 zinc(II) cyanide-morpholine complex and a four-coordinated, monomeric pseudotetrahedral structure is suggested for the complex. The 1:1 zinc(II) and cadmium(II) cyanide-morpholine complexes are considered to have four-coordinated polymeric chain structures with bidentate bridged morpholine. The trans or chair configuration of the uncoordinated morpholine is retained in all the complexes.

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