A chiral spiro-oxime ligand and its organopalladium(II) coordination chemistry

The reaction of (±)-1,6-Bisoximo[4.4]nonane 1 (prepared quantitatively from the reaction of hydroxylamine hydrochloride and (±)-spiro[4.4]-1,6-nonanedione) with cyclopalladated compounds [Pd(o-C6H4CH(R)NMe2)-μ-Cl]2 (RH, Me) in the presence of KPF6 yields monocationic dimeric complexes of the type [Pd(o-C6H4CH(R)NMe2)-(μ-1)-μ-Cl]PF6 containing the bisoxime bridging two palladium centers. The structures of the oxime ligand 1 and the dimeric palladium complex (RH) 2 were determined by means of X-ray diffraction analysis.