E. Lippmann et al., ORGANOMETALLIC LEWIS-ACIDS .49. BIS(ACYL)-BRIDGED HETEROMETALLIC COMPLEXES OF RHENIUM, MOLYBDENUM, RUTHENIUM, AND COPPER, Chemische Berichte, 126(4), 1993, pp. 933-940
The reaction of the metalla-beta-diketonate complex [(OC)4-Re[-C(Me)O]
2][NMe4] With various organometallic Lewis acids yields the bis(acyl)-
bridged bimetallic complexes (OC)4-Re[-C(Me)O-]2Re(CO)4 (1), (OC)4Re[-
C(Me)O-]2MoCp(CO)2 (2), (OC)4Re[-C(Me)O-]2Ru(eta3-C3H5)(nbd) (nbd = no
rbornadiene) (3), [(OC)4Re[-C(Me)O-]2Ru(PPh3)2(CO)2][BF4] (4), and (OC
)4Re[-C(Me)O-]2Cu[-O(Me)C-]2Re(CO)4 (5), respectively. The structures
of the compounds 1 - 5 have been determined by X-ray diffraction. They
show different conformations of the six-membered ring Re[ - C(Me)O-]2
[M]. The molecular structure of complex 1 proves a ''flipping'' of the
acyl ligands.