The reaction between LaCl3 and LiCl in THF at room temperature, with hexane as precipitant and glycol di-Me ether (DME) as complexing agent, gave LaCl(DME)(m2-Cl)5(m3-Cl)(La.DME)Li(THF)2. Its structure was studied by single crystal x-ray diffraction technique. The complex belongs to the triclinic space group P1 with a 11.123(3), b 16.564(5), c 8.653(3)8 ? a 95.16(3)8 b 95.63(3), g 74.71(2)? Z = 2, R = 0.0303. The mol. presumes to have a chain conformation in which the La3+ ions are linked by m2- and m3-bridged Cl atoms alternatively. The average bond lengths of La-Cl in m3-chloro-bridge bond and m2-chloro-bridge bond are 2.972 and 2.886 ? resp. The average bond lengths of La-O and Li-O are 2.611 and 1.927 ? resp.

Key words: CRYSTAL STRUCTURE DETERMINATION, CYCLOPENTADIENE P, TETRAHYDROFURAN, RARE EARTH METAL COMPLEX, DINUCLEAR COMPLEX, BRIDGE COMPOUNDS, LITHIUM COMPLEX, ETHYLENE ALCOHOL METHYL ETHER P