Chloro-diorganotin(IV) Complexes of Pipyridyl Dithiocarbamate: Syntheses and Determination of Kinetic Parameters, Spectral Characteristics and Biocidal Properties

S. Shahzadi^a, S.U. Ahmad^a, S. Ali^a,*, S. Yaqub^a and F. Ahmed^b

^aDepartment of Chemistry, Quaid-i-Azam University, Islamabad-45320, Pakistan
^bNESCOM, P.O.Box. 2216, Islamabad, Pakistan

(Received 8 October 2005, Accepted 2 December 2005)

      Organotin complexes of the general formula R₂Sn(Cl)L have been synthesized where R = CH₃, C₂H₅, C₄H₉, C₆H₅, C₇H₇, and   L = 1-piperidinecarbodithioic acid. These complexes have been characterized by elemental analysis, FT-IR, ¹H NMR and mass spectrometry. The spectroscopic and XRD data shows that the dithiocarbamate ligand acts as a bidentate ligand. These complexes were also tested for biocidal activity. Thermal studies of the reported complexes have been carried out to investigate the degradation pattern and thermal stability while kinetic parameters were calculated from the thermogravometric (TG) trace. Silent features of X-ray structures for (1) and (4) are also given.

Keywords: Chloro-diorganotin(IV) complexes, Dithiocarbamate, S-donor ligand, FT-IR, Mass spectrometry, ¹H NMR, Biocidal activity