REACTIVITY OF ACETATE-BRIDGED CYCLOPALLADATED COMPLEXES - H-1 AND C-13 NMR-STUDIES OF SOME MONOMERIC DERIVATIVES OF N-(4-METHOXYPHENYL)-ALPHA-BENZOYLBENZYLIDENEAMINE

The reactions have been studied of acetate-bridged cyclopalladated com plexes with different reagents to yield monomeric structures. The rela tive reactivity is even higher than that of the corresponding chloro- and bromo-dimers, usually obtained from the acetates and used as start ing materials in bridge-cleavage reactions. The H-1 and C-13 NMR spect ra of the monomeric complexes have allowed evaluation of the influence of the palladium on the chemical shifts of the surrounding nuclei. Th e slow crystallization of [{Pd(mu-Br)(4-MeOC6H4N=C(COC6H5)C6H4)}2] fro m DMSO induces a bridge-splitting reaction to afford [Pd(4-MeOC6H4N=C( COC6H5)C6H4)(DMSO)Br].