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Structural studies of complexes containing cycloplatinated tris(pyrazol-1-yl)methane


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Canty, AJ, Skelton, BW and White, AH 1992 , 'Structural studies of complexes containing cycloplatinated tris(pyrazol-1-yl)methane' , Journal of Organometallic Chemistry, vol. 430, no. 2 , pp. 245-257 , doi: 10.1016/0022-328X(92)86011-R.

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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.

Item Type: Article
Authors/Creators:Canty, AJ and Skelton, BW and White, AH
Journal or Publication Title: Journal of Organometallic Chemistry
ISSN: 0022-328X
DOI / ID Number: 10.1016/0022-328X(92)86011-R
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