Metal Saccharinates and Their Complexes with N-donor Ligands*

The structural data for metal saccharinates and metal complexes including saccharin and various coordinated mono(imidazole, pyridine) or polycyclic N-donor ligands (2,2'-bipyridine, 1,10-phenantroline) were retrieved from the Cambridge Structural Database and analyzed. The influence of the nature of the metal ion and of the type of the metal-to-ligand bonding on the saccharinato geometry was examined. The structural data obtained by X-ray diffraction were correlated with the IR spectral features in the regions of the characteristic n(CO) and n(SO2) modes originating from the saccharinato ligands/ions as well as with the vibrations related to the n(OH) and n(OD) modes (in the case of crystallohydrates).