METAL-COMPLEXES OF SULFANILAMIDE DERIVATIVES - CRYSTAL-STRUCTURE OF [ZN(SULFATHIAZOLE)2].H2O

The crystal structure of the Zn(sulfathiazole)2 . H2O complex is reported. The complex crystallizes in the monoclinic space group C2/c. The cell dimensions are a = 9.098(3) angstrom, b = 17.871(5) angstrom, c = 14.61(1) angstrom, beta = 99.44(6)-degrees, V = 2343(2) angstrom3, Z = 4, and D(x) = 1.68 g/cm3. The final conventional R-factor = 0.027 for 2669 ''observed'' reflections and 191 variables. The Zn ion is surrounded in a regular tetrahedral arrangement by two N(amino) and two N(thiazole) atoms pertaining to four sulfathiazole (Hstz) ligands. Each stz anion, acting as a bidentate ligand, chelates to two Zn ions as a bridge through the N(thiazole) and the N(amino) atoms. The IR, C-13 NMR in solid state, H-1 NMR, and C-13 NMR in DMSO(d6) solutions spectra are discussed in detail with regard to the crystal structure.