Synthesis and characterization of technetium(III) complexes with Schiff-base and phosphine ligands. Molecular structure of (diethylphenylphosphine)[N-(2-oxidophenyl)salicylideneiminato-NOO?] (quinolin-8-olato-NO)technetium(III)

The complexes [TcL(L?)L?] [L? = PEt2Ph, PMe2Ph, or PPh3; L = N-(2-oxidophenyl)salicylideneiminate (L1) or N-(2-sulphidophenyl)salicylideneiminate (L2); L? = quinolin-8-olate (quin) or salicylideneiminate (L3)] were synthesized starting from [TcO(L)(L?)] and characterized by means of physicochemical measurements and for [TcL1(quin) (PEt2Ph)] by means of X-ray analysis. The co-ordination around technetium is approximately octahedral with the phosphine ligand trans to the imino nitrogen of the ligand quin and the tridentate ligand L1 on a plane orthogonal to the line P-Tc-N. The complex crystallizes in the triclinic space group P1? with a = 14.196(6), b = 11.363(5), c = 9.742(4) Å, ? = 68.04(3), ? = 101.09(3), ? = 106.68(3)°, and Z = 2. The structure has been refined to R = 0.070 for 1 743 independent reflections.