Synthesis and Reactions of Heterobimetallic Manganese-Palladium Complexes. Crystals and Molecular Structure of

Article abstract of DOI:10.1039/DT9840001831

Reaction of with (dba=1,5-diphenyl-1,4-pentadien-3-one) in hot toluene in the presence of Ph2PCH2PPh2 (dppm) affords in varying yield dependent upon X.Metathesis of complex (2) with NaX gives (3; X=I), (4; X=N3), (5; X=NCO), and (6; X=SCN), and a reversible insertion of SnCl2 into the PdCl bond of (1) affords (7; X=SnCl3).Protonation of complexes (1)-(7) or of with HBF4*Et2O or CF3CO2H affords unstable cationic hydride complexes.Infrared, 1H, 31P, and some 13C n.m.r. data of (1)-(7) and their protonated forms are given and discussed.The structure of complex (2) was established by a single-crystal X-ray diffraction study: the crystals are monoclinic, space group Cc, with a=18.317(2), b=13.412(2), c=21.013(4) Angstroem, and β=111.75(1) deg; refined to R 0.057 for 7286 reflections =3?(I)> collected by counter methods.The molecule consists of a near-planar Mn(CO)3PdBr entity oriented perpendicular to the plane of the phosphorus atoms forming the (dppm)2 framework.Including the Mn-Pd bond <2.810(2) Angstroem>, the palladium environment is square planar, but there is also evidence of an additional interaction involving a carbonyl.The manganese environment has an irregular six-co-ordinate geometry.

Full text of DOI:10.1039/DT9840001831

View Article Online / Journal Homepage / Table of Contents for this issue

View Article Online

View Article Online

View Article Online

View Article Online

View Article Online