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.

Graphical abstractThe 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 full-size imageDownload as PowerPoint slide