Structural and spectroscopic characterization of tris (o-phenanthroline)iron(II) disaccharinate monosaccharin hexahydrate

The crystal and molecular structure of the title compound. for short [Fe(o- phen)(3)](sac)(2). (Hsac). 6H(2)O, has been determined by X-ray diffraction methods. It crystallizes in the monoclinic space group P2(1)/n with a = 16 .3190(1), b = 19.2890(1), c = 17.4490(2) Angstrom, beta = 92.586(1)degrees, V = 5486.95(8) Angstrom (3) and, Z = 4. The investigated compound constitu tes the first example of a species in which uncoordinated saccharin and sac charinate anions are present in the structure. The crystallographic results reveal the subtle differences between the structure of the neutral molecul e and its anion. The complex was also characterized by means of infrared, e lectronic, and Fe-57-Mossbauer spectroscopy. Its magnetic susceptibility wa s determined at room temperature and its thermal behavior investigated by m eans of thermogravimetric and differential thermal analytical techniques.