SYNTHESIS, MOLECULAR-STRUCTURE, AND REACTIVITY OF ORGANOLANTHANIDE FLUORIDE COMPLEXES, [((ME3SI)(2)C5H3)(2)LN(MU-F)](2) (LN=LA, ND, SM, GD)AND [(C5H5)(2)LN(MU-F)(THF)](2) (LN=Y, YB)

Treatment of Me3NHF with I equiv of [(Me3Si)(2)C5H3](3)Ln or (C5H5)(3) Ln in THF gave [{-(Me3Si)(2)C5H3}(2)LnF](2) (Ln = La (1), Nd (2), Sm ( 3), Gd (4)) or [(C5H5)(2)LnF(THF)](2) (Ln = Y (5), Yb (6)) in moderate to good yield. All of them were fully characterized by elemental anal yses, spectroscopy, and X-ray analyses. Compound 3 reacted with Na, Al Cl3, (C6H5)(3)-SiOH, and 2,6-(Pr2C6H3OH)-C-i to form [(Me3Si)(2)C5H3]( 2)Sm(THF), [{(Me3Si)(2)C5H3}(2)SmCl](2), [(C6H5)(3)SiO](3)Sm(THF)(3) ( 7), and [2,6-(Pr2C6H3O)-C-i](3)Sm(THF)(3) (8), respectively. The molec ular structures of [{(Me3Si)(2)C5H3}(2)SmCl](2), 7, and 8 were confirm ed by X-ray diffraction study. The 3/NaH system can convert C6H5Br int o C6H6 in 32% yield.