2957 25 archive 185 disk0/00/00/29/57 2008-02-04 22:09:18 2008-07-18 10:30:18 2008-07-16 16:46:08 article show allan.canty@utas.edu.au Canty AJ allan.canty@utas.edu.au Skelton BW White AH pub 039904 259901 restricted The definitive version is available at http://www.sciencedirect.com Cyclometallation at the C(5) position of one ring of tris(pyrazol-1-yl)methane occurs on dissolutionof PtMe2{(pz)3CH} in 3,5-dimethylpyridine, to form the platinum(II) complex PtMe((pz)2(C3H2N2)-CH-N,C)(3,5-Me2py) (lb). Structural studies of lb, and the related complexes PtMe{(pz)3(C3H2N2)-CH-N,C}(N-methylimidazole) (1c) and PtMe{(pz)2(C3H2N2)CH- N,C}{PPh2(o-MeOC6H4)} (ld) show that these complexes have square planar geometry with cis-organic groups, with the cyclometallated group having one pyrazole ring uncoordinated. The complexes PtMe{(pz)2(C3H2N2)CH-C}(L2) (L2 = 2PPh3 (2a), 2PEtPh, (2b), Ph2PCH2CH2PPh2 (2c)] have a similar geometry at platinum(II); the metallated ligand is present as a [C]- donor with two uncoordinated pyrazole rings. In 2a, 2b, and 2c, there are short Pt...H contacts at ~2.7 A for the methine proton of the cyclometallated ligand. 1992 published Journal of Organometallic Chemistry 430 2 245-257 10.1016/0022-328X(92)86011-R TRUE 0022-328X http://dx.doi.org/10.1016/0022-328X(92)86011-R 3918 3 2957 1 application/pdf en staffonly cc_utas

JOMC1992_2C_245.pdf

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