SYNTHESIS AND REACTIVITY OF ACETYLACETONATO-C-GAMMA COMPLEXES OF M(II) (M=PD OR PT) - X-RAY CRYSTAL-STRUCTURE OF [PD(C6F5)(OOCPH)(BIPY)]CENTER-DOT-CHCL3

Acetylacetonato-C-gamma complexes of stoichiometry [M(C(6)X(5))(acac-C-gamma)(N-N)](M=Pd; X=F or Cl; N-N=1,10-phenanthroline or 2,2'-bipyridine)(M=Pt; X=F; N-N=1,10-phenanthroline (phen), or 2,2'-bipyridine (bipy)) have been obtained by treatment of the acetylacetonato-O,O' complexes [M(C(6)X(5))(acac-O,O')(tht)](tht=tetrahydrothiophene) with the corresponding N-N base in 1/1 molar ratio. Complexes [Pd(C6F5)(acac-C-gamma)(phen)] (1) and [Pd(C6F5)(acac-C-gamma)(bipy)] (2) react with organic substrates containing acidic hydrogen atoms [HR], yielding the corresponding complexes [Pd(C6F5)(R)(N-N)] (R=CF3COO, CH3COO, PhCOO, PhS or P(S)Ph(2)). However, the reaction of 2 with HPPh(2) affords the dinuclear phosphido-bridged complex [{Pd(mu-PPh(2))(C6F5)(HPPh(2))}(2)]. All complexes have been characterized by spectroscopic methods (IR and H-1, F-19 and P-31{H-1}NMR) and the molecular structure of [Pd(C6F5)(OOCPh)(bipy)]. CHCl3 (12) has been determined by X-ray diffraction methods.