Synthesis, spectroscopic characterization, structural studies and antibacterial and antitumor activities of diorganotin complexes with 3-Methoxysalicylaldehyde (cas 148-53-8) thiosemicarbazone
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Add time:09/29/2019 Source:infona.pl
Three organotin(IV) complexes, Ph 2 Sn(mstsc) (1), Me 2 Sn(mstsc) (2) and Bu 2 Sn(mstsc) (3), have been synthesized from reaction of R 2 SnCl 2 (R=Ph, Me and Bu) with 3-Methoxysalicylaldehyde (cas 148-53-8) thiosemicarbazone (H 2 mstsc). The synthesized complexes have been characterized by elemental analysis and FT-IR, 1 H, 13 C and 119 Sn NMR spectroscopy. The structures of 2 and 3 have been also confirmed by X-ray crystallography. On the basis of spectral and structural data thiosemicarbazone acts as a tridentate dianionic ligand and coordinates to tin through phenolic oxygen, the azomethine nitrogen and thiolate sulfur atoms. The metal coordination geometry for 2 and 3 is described as distorted square pyramid and the crystal lattices are stabilized by intermolecular hydrogen bands. On the basis of 119 Sn NMR data, coordination number of tin retains five in solution. The in vitro antibacterial activity of ligand and its complexes has been evaluated against one Gram-positive and three Gram-negative bacteria. Complex 2 exhibited good activity along with the standard antibacterial drugs. The in vitro cytotoxicities of the synthesized compounds against Jurkat cells were evaluated by the standard WST-1 assay. The activity decreases in the order 3>1>2=H 2 mstsc.
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