Me3SnF (1) reacts with Cp'MCl3 to give Cp'MF3 (2, Cp' = C5Me5, M = Ti; 2a, Cp' = C5Me4Et, M = Ti; 2b, Cp' = C5H5, M = Ti; 2c, Cp' = C5H4Me5, M = Ti; 3, Cp' = C5Me5, M = Zr; 4, Cp' = C5Me5, M = Hf) in high yields. The reaction of Cp2TiCl2, [C5H3(Me)(SiMe3)]2ZrCl2, and (C5Me5)2HfCl2 with Me3SnF yields Cp2TiF2 (5), [C5H3(Me) (SiMe3)]2ZrF2 (6), and (CsMe5)2HfF2 (7), respectively. Treatment of (Cp*TiClO)3 (Cp* = C5Me5) with Me3SnF leads to the eight-membered ring (Cp*TiFO)4 (8). The reaction of the organotitanium(III) chlorides (Cp2TiCl)2 (Cp = C5H5), [(C5H4Me)2TiCl]2, and Cp*2TiCl with Me3SnF gives the corresponding fluorides (Cp2TiF)2 (9), [(C5H4Me)2TiF]2 (10), and Cp2*TiF (11), respectively. An alternative method for the preparation of compounds 9 and 10 is the reduction of Cp2TiF2 and (C5H4Me)2TiF2, respectively, using sodium amalgam. The structures of 2c, 3, 4, and 10 were determined by single-crystal X-ray diffraction. Compounds 3 and 4 are isostructural and form tetramers in the solid as well as in solution. 10 is a fluorine-bridged dimer in the crystalline state.
Synthesis and the crystal structures of a monoanionic tetrafluorodentate ligand and its complex with lanthanum ion
作者:Franc Perdih、Alojz Demšar、Andrej Pevec、Saša Petriček、Ivan Leban、Gerald Giester、Joachim Sieler、Herbert W Roesky
DOI:10.1016/s0277-5387(01)00789-6
日期:2001.6
New organotitanium fluorides [Hdmpy](+)[(C5Me4R)(2)Ti2F7](-) (R = Me 4, Et 5, dmpy = 2,6-dimethylpyridine, lutidine) have been prepared from (C5Me4R)TiF3 and 2,6-dimethyIpyridine . (HF)(2). The compounds 4 and 5 react with La(CF3SO3)(3) to give [La(C5Me4R)(2)Ti2F7}(3)] (R = Me 6, Et 7) containing the [(C5Me4R)(2)Ti2F7](-) anion as a tetrafluorodentate ligand in the crystal structures of 4 and 7. The cation-anion pair is connected by a hydrogen bond in 4 and the all-fluorine environment of 12 fluorine atoms coordinated to a lanthanum ion is found in 7. (C) 2001 Elsevier Science Ltd. All rights reserved.
Synthesis, spectroscopic and X-ray characterization of new molecular organotitanium(IV) phosphonate
Dititanate [Ti(C5Me4Et)(mu-O2P(OH)Me)(mu-O2P(O)Me)}(2)] (1) was prepared from (C5Me4Et)TiF3 and MeP(O)(OSiMe3)(2). The molecular structure of compound I has been determined by single-crystal X-ray diffraction analysis. In the cage cluster, two titanium atoms are bridged by two bidentate monoanionic and by two bidentate dianionic phosphonate groups. The OH group of the monoanionic phosphonate and oxygen atom of the dianionic phosphonate are connected by strong intramolecular hydrogen bond. The NMR spectroscopy reveals the fast proton migration within the hydrogen bond. (c) 2007 Elsevier B.V. All rights reserved.
Pevec, Andrej; Demsar, Alojz; Gramlich, Volker, Journal of the Chemical Society, Dalton Transactions, 1997, # 13, p. 2215 - 2216
作者:Pevec, Andrej、Demsar, Alojz、Gramlich, Volker、Petricek, Sasa、Roesky, Herbert W.