Synthesis and crystal structure of an organolanthanide fluoride, [{(Me3Si)2C5H3}2Sm(μ-F)]2
摘要:
Treatment of [(Me3Si)(2)C5H3](2)SmI(THF) with stoichiometric amounts of AgSbF6 in dry diethyl ether, or reaction of [(Me3Si)(2)C5H3](3)Sm with one equivalent of Me3NHF in dry 1,2-dimethoxyethane afforded the dimeric complex [{(Me3Si)(2)C5H3}(2)Sm(mu-F)](2) in good yield, which represents the first structurally characterized example of a fluoride-bridged organosamarium complex. It crystallizes in space group P2(1)/n with a = 12.215(1)Angstrom, b = 16.028(1)Angstrom, c = 15.677(1)Angstrom, beta = 99.78(1)degrees, V = 3025(2)Angstrom(3), and Z = 2 for D-calcd = 1.292gcm(-3). Least squares refinement of the structural model based on 5471 reflections (\F\>6.0 sigma\F\) converged to R-F = 0.040. The average Sm(1)-F distance is 2.302(3)Angstrom. (C) 1997 Elsevier Science S.A.