Synthesis, spectroscopic and structural investigation of Zn(NCS)2(nicotinamide)2 and [Hg(SCN)2(nicotinamide)]n

Zinc(II) and mercury(II) thiocyanate complexes with nicotinamide, bis(nicotinamide-N)-bis(thiocyanato-N)zinc(II) (1) and catena-[nicotinamide-N-(μ-thiocyanato-S,N)(thiocyanato-S)mercury(II)] (2), have been prepared and characterized by spectroscopic, thermal and X-ray crystallographic methods. The vibrational bands of diagnostic value are compared to the values of the free ligand and the data are in good correlation with the X-ray results. Centrosymmetrical hydrogen bonded dimers are found, R22(10) in 1 and R22(8) in 2.

The nicotinamido (nia) complexes of the thiocyanates of zinc (1) and mercury(II) (2) were prepared and spectroscopically and thermally characterized, and their structures were determined by X-ray crystallography. The nia ligand acts as a monodentate ligand through the pyridine nitrogen. Compound 1 comprises of monomeric [Zn(SCN)2(nia)2], while compound 2 of polymeric [Hg(SCN)2(nia)]n units. Centrosymmetric H-bond dimers of R22(10) type in 1 and of R22(8) type in 2 are formed.Figure optionsDownload as PowerPoint slide