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Trimethylpalladium(IV) chemistry. Conformational and fluxional effects in related palladium(IV) and platinum(IV) complexes of flexible bidentate nitrogen donor ligands

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Byers, PK, Canty, AJ, Honeyman, RT and Watson, AA 1990 , 'Trimethylpalladium(IV) chemistry. Conformational and fluxional effects in related palladium(IV) and platinum(IV) complexes of flexible bidentate nitrogen donor ligands' , Journal of Organometallic Chemistry, vol. 385, No. 3 , pp. 429-438 , doi: 10.1016/0022-328X(90)85014-P.

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Abstract

Iodomethane reacts with palladium(II) complexes PdMe2(L2), where L2 is a flexible nitrogen donor ligand such as l,l-bis(pyridin-2-yl)ethane [(py)2CHMe], to form unstable trimethylpalladium(IV) complexes characterized as fac-PdIMe3(L2) by comparison of their variable temperature 1H NMR spectra with those of stable trimethylplatinum(IV) analogues. The complexes fac-MIMe3{(py)2CHMe} occur as
mixtures of isomers, with the chelate ring having the CH group adjacent to iodine in one isomer and adjacent to the methyl group trans to iodine in the other isomer. Complexes containing pyrazol-l-y1 (pz) or N-methylimidazol-l-y1 (mim) donors, fac-MIMe3(L2) [L2 = (pz)2CH2, (pz)(mim)CH2, and (py)(pz)CH2] undergo fluxional behaviour involving inversion of the six-membered chelate rings.

Item Type: Article
Authors/Creators:Byers, PK and Canty, AJ and Honeyman, RT and Watson, AA
Journal or Publication Title: Journal of Organometallic Chemistry
ISSN: 0022-328X
DOI / ID Number: 10.1016/0022-328X(90)85014-P
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