NEW CHIRAL COMPLEXES OF PALLADIUM(0) CONTAINING P,S-BIDENTATE AND P,P-BIDENTATE LIGANDS

New chiral complexes of Pd(O) containing either the bis(phosphine) (6, 6'-dimethoxybiphenyl-2,2'-diyl)bis(3,5-di-tert -butylphenylphosphine) (MeO-BIPHEP, 1) or the phosphine-sulfur chelate etra-O-acetyl-1-{(2-di phenylphosphino)benzyl)thio) -beta-D-glucopyranose ((2-Ph2PC6H4CH2) -S -CHCH(OAc)CH(OAc)CH(OAc)CH(CH2OAc)O,2) have been prepared, and the sol id-state structure of one of these, Pd(benzoquinone)(2), has been dete rmined. These Pd(O) complexes reveal interesting solution dynamics, as shown by 2-dimensional exchange spectroscopy. For the MeO-BIPHEP deri vatives, one can obtain useful structural insights based on the observ ed restricted rotation around the aryl(3,5-di-tert-butylphenl)P-C bond s.