Cyclopalladated Hydrazones Complexed to Pyridinyl Ligands

2-Benzoylpyridine and 2-acetylpyridine N-methyl-N-phenylhydrazones (HL1 and HL2) in cyclopalladation reactions with Pd-3(OAc)(6) behave as N(py)N(im)C tridentate ligands and form the neutral mononuclear complexes [Pd(k(3)-N,N,C-L-1,L-2)(k(1)-OAc)] (1 and 2). The labile OAc ligand can be replaced by pyridine (py) and, in the presence of NH4PF6, a compound of the general formula [Pd(k(3)-N,N,C-L-1,L-2)(py)]PF6 (3 and 4) can be obtained. Reacting 1 or 2 with the poly(4-vinylpyridine) polymer (PVP, (M) over bar (w) = 160000) adducts of the general formula x[Pd(k(3)-N,N,C-L-1,L-2)(PF6)]center dot y[PVP] gives (5a-c and 6a-c, a-c: x/y = 80/20, 50150, 25/75 w/w) containing the laterally appended cyclopalladated "Pd(k(3)-N,N,C-L-1,L-2)" fragments. These metallorganic polymers show high glass transition temperatures, high thermal stability and good solubility, and are optimal for obtaining transparent thin films by the spin coating method.