Platinum thiacrown complexes with substituted diimine ligands

CHED 1210

Marko Bajic, Department of Chemistry, University of Tennessee at Chattanooga, 615 McCallie Avenue, Chattanooga, TN 37403 and Gregory J Grant, Greg-Grant@utc.edu, Department of Chemistry, University of Tennessee, Chattanooga, TN 37419.
Our group is interested in synthesizing new platinum(II) thiacrown complexes of the general formula [Pt(9S3)(L)] 2+ where 9S3 is the thiacrown 1,4,7-trithiacyclononane and L is a substituted 1,10-phenanthroline(phen) ligand. We have studied a variety of 1,10-phenanthroline ligands including 5,6-dimethyl-phen, 4,7-dimethyl-phen, 4,7-diphenyl-phen, and 5-nitro-phen. Along with these phen ligands we have also examined 2,2'-biquinoline, a ligand with a similar diimine ring structure. Particularly, we are interested in how the different substituents on the phen ligand affect the properties of their platinum complexes. We have examined the complexes using FT-IR, 1H NMR, 13C NMR, 13C DEPT NMR, UV-Visible spectroscopy, elemental analysis, and 195Pt NMR. The crystal structure for the Pt complex with 5,6-dimethyl-phen is also reported.