VARIETY OF NAPHTHALENE COORDINATION MODES IN THE POLYNUCLEAR (PENTAMETHYLCYCLOPENTADIENYL)LUTETIUM NAPHTHALENE COMPLEX 5ME5LU)(3)(C10H8)(C10H7)(H)][(NA(THF)(3)])(2)C10H8

The reaction of C5Me5LuCl2 with sodium naphthalenide in DME solution a ffords the mononuclear complex C5Me5LuC10H8(DME) (1) in 48% yield besi des naphthalene and NaCl. The same reaction in THF solution gives a se ries of products: (C5Me5)Lu(C10H8)(2)Na(THF)(x) (2), C5Me5Lu)(3)(C10H8 )(C10H8)(H)][Na(THF)(3)]}(2)C10H8 (3) and [(C5Me5)LuH(THF)](3)(C10H7) (4). The polynuclear complex 3 with several modes of Lu-naphthalene in teraction has been isolated in low yield in a monocrystalline form. An X-ray diffraction study has shown that complex 3 consists of three C5 Me5Lu units joined by two non-planar bridging C10H8 and C10H7 ligands via different kinds of naphthalene coordination mode. The third planar C10H8 group is not involved in coordination sphere of the Lu atoms, a nd is on an inversion centre in the crystal structure. The Na atom in 3 is bonded to three THF molecules and eta(3)-bonded to the bridging C 10H7 group. (C) 1997 Elsevier Science S.A.