Abstract
The coordination mode of the ambidentate ligand 4,6-dimethylpyrimidine-2-thione (Me 2PymtH) was investigated with respect to the organotin(IV) compounds, namely Me 2SnCl 2, n-Bu 2SnCl 2, Ph 2SnCl 2 and Ph 3SnCl. An X-ray crystal structure determination carried out on cis-[Ph 2Sn(Me 2Pymt)] ( 3) and [Ph 3Sn(Me 2Pymt)] ( 4) revealed that the Me 2Pymt − ligand is N,S-coordinated in both complexes. The Sn(IV) atom is six-coordinated in 3 and five-coordinated in 4. The similarities observed in the IR, NMR ( 1H, 13C) and mass spectroscopy are indicative of a similar behavior of the ligand in all the complexes, thus suggesting a six-coordination in the dimethyltin ( 1) derivative and five-coordination in the dibutyltin ( 2) one. The complexes were characterized by means of elemental analysis, IR, NMR ( 1H, 13C) and mass spectroscopic methods.
Published Version
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