Synthesis, Structural characterization and Biological Studies of six- and fivecoordinated organotin(IV) complexes with the thioamides 2-mercaptobenzothiazole, 5-chloro-2mercaptobenzothiazole and 2-mercaptobenzoxazole
Synthesis, Structural characterization and Biological Studies of six- and fivecoordinated organotin(IV) complexes with the thioamides 2-mercaptobenzothiazole, 5-chloro-2mercaptobenzothiazole and 2-mercaptobenzoxazole
(EN)
Xanthopoulou, M. N., Hadjikakou, S. K., Hadjiliadis, N., Kubicki, M., Skoulika, S., Bakas, T., Baril, M., Butler, I. S.
(EN)
Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας
(EL)
Xanthopoulou, M. N., Hadjikakou, S. K., Hadjiliadis, N., Kubicki, M., Skoulika, S., Bakas, T., Baril, M., Butler, I. S.
(EN)
Organotin(IV) complexes with the formulas [(C6H5)3Sn(mbzt)] (1), [(C6H5)3Sn(cmbzt)] (3), and [(C6H5)2Sn(cmbzt)2] (4) (Hmbzt ) 2-mercaptobenzothiazole and Hcmbzt ) 5-chloro-2-mercaptobenzothiazole) have been synthesized and characterized by elemental analysis; FT-IR, Raman, 1H, 13C, and 119Sn NMR, and Mo¨ssbauer spectroscopic techniques; and X-ray crystallography at various temperatures. The crystal structures of complexes 1, 3, and 4 were determined by X-ray diffraction at room temperature [295(1) or 293(2) K]. The complexes [(C6H5)3Sn(mbzo)] (2) and [(n-C4H9)2Sn(cmbzt)2] (5) (Hmbzo ) 2-mercaptobenzoxazole) were synthesized by new improved methods, and their structures were determined at low temperature [100(1) K] and compared to those solved at room temperature. Comparison with {(CH3)2Sn(cmbzt)2]} (6), already reported, was also attempted. The influence of temperature on the geometry of the complexes is discussed. In the cases of complexes 1-3, three carbon atoms from phenyl groups and one sulfur atom and one nitrogen atom from thione ligands form a tetrahedrally distorted trigonal-bipyramidal geometry around the five-coordinate tin(IV) ion. In complexes 4-6, two carbon atoms from aryl groups and two sulfur atoms and two nitrogen atoms from thione ligands form a distorted tetrahedral geometry, tending toward octahedral, around the six-coordinate tin(IV) ions, with trans-C2, cis-N2, and cis-S2 configurations. Although the C-Sn and S-Sn bond distances are found to be constant in compounds 1-6, their N-Sn bond lengths vary significantly (from 2.635 to 3.078 Å), with the longer distances found in the cases of five-coordinate complexes 1-3.
(EN)
