A new binuclear lutetium(III) dimethyl-N-trichloroacetylamidophosphate complex with a γ,γ′-dipyridyl bridge, {Lu[CC13 C(O)NP(O)(OCH3)2]3)2-μ(γ,γ′-dipy)

A new type of binuclear coordination compound of lutetium, {Lu2L6. mu-(gamma,gamma (')-dipy)} (where L = dimethyl-N-trichloroacetylamidophosphate anion and gamma,gamma ' -dipy = 4,4 ' -dipyridyl), has been obtained. The IR spectroscopic data reveal that the ambidentate phosphoryl ligand is coordinated to the metal center in a bidentate manner via the phosphoryl and carbonyl oxygen atoms. The crystal and molecular structure of {Ln(2)L(6). mu-(gamma,gamma ' -dipy)} has been determined by means of X-ray diffraction (triclinic, space group P (1) over bar with parameters: a = 9.259(2), b = 12.530(3), c = 16.548(3) Angstrom, alpha = 85.44(3)degrees, beta = 75.64(3)degrees, gamma = 70.56(3)degrees, Z = 1). The structure is made up of centrosymmetric binuclear molecules, in which the neutral heterocyclic ligand is coordinated to the metal centers in a bidentate bridging manner via its nitrogen atoms. The coordination number of each Lu(III) atom is 7 [60(L-) + N((gamma,gamma ' -dipy)]. Phosphoryl and carbonyl groups of the L- ligands are disposed in syn-position and are included in the six-membered chelate metallocycles. The coordination polyhedron of lutetium can be described as distorted mono-capped octahedron.