We have prepared a series of pseudo five-coordinate cyclometallated complexes of the form [Au(9S3)(C^N)](PF6)2 (9S3 = 1,4,7-trithiacyclononane; C^N = 2-phenylpyridinate , 2-(p-tolyl)pyridinate, 2-(2'-benzothienyl)pyridinate).  The X-ray structures of each these complexes reveal a square planar geometry at the gold center with an additional axial Au-S interaction (2.82-2.86�) facilitated by the endodentate conformation of the 9S3 ligand.  The 9S3 ligand of each complex is fluxional in solution as indicated by NMR studies.  Electrochemistry and electronic spectroscopy of these systems reveal the influence of the cyclometallated ligands on the d8 gold(III) centers.  Structural and spectroscopic features of these gold complexes will be compared with platinum(II) and palladium(II) analogs previously studied.

Cyclometallated Gold (III) complexes with trithiacyclononane ligands

243rd National Meeting (2012)

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