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Abstract

Neutral palladium(IV) complexes containing the bis(pyrazol-1-yl)borate ligand, PdMe3{(pz)2BH2}(L) [L=py-d5 (4), PMe2Ph
(6)], are generated in solution by oxidative addition of iodomethane to [PdMe2{(pz)2BH2}]− at −70 °C followed by addition of L; the Pd(IV) complexes reductively eliminate ethane above 0 °C. Stable Pt(IV) analogues of 4 and 6 have been isolated, and comparison of NMR spectra for Pd(IV) and Pt(IV) species support structural assignments for the unstable Pd(IV) complexes. The complex PtMe3{(pz)2BH2}(py) (1a) has been characterised by X-ray diffraction, together with Pt(mq)Me2{(pz)2BH2} (2) (mq=8-methylquinolinyl); both complexes show a fac-PtC3 configuration for Pt(IV), and for 2 the PtN distances are ~0.03 A shorter than in the isostructural Pd(IV) complex.

Item Type:	Article
Authors/Creators:	Canty, AJ and Patel, J and Pfeffer, M and Skelton, BW and White, AH
Keywords:	Organoplatinum; Intramolecular coordination; Oxidative addition; Crystal structures; Isostructural complexes; Palladium(IV) phosphine; Bis(pyrazol-1-yl)borate
Journal or Publication Title:	Inorganica Chimica Acta
ISSN:	0020-1693
DOI / ID Number:	10.1016/S0020-1693(01)00683-1
Additional Information:	The definitive version is available at http://www.sciencedirect.com
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