Unprecedented behavior of 2,2 ': 6 ',2 ''-terpyridine: Dinuclear platinum(II) derivatives with a new N,(CC)-C-boolean AND,N bridging ligand

We report the synthesis and characterization of some dinuclear organoplatin um(II) species where 2,2':6',2''-terpyridine (terpy) behaves as a 2-fold-de protonated N,C<^>C,N ligand bridging two [Pt(CH3)(L)] units (L = neutral li gand). Each platinum atom is further bonded to a nitrogen of a terminal pyr idine and to a 3' or 5' carbon atom of the inner pyridine ring. As far as w e know, these are the first examples of cyclometalated terpy as well as of a 3,5-dimetalated pyridine ring. The X-ray structure of one of these specie s (L = CO) shows it to be an organoplatinum polymer.