A General Route to Perfluoroalkyl- and Trifluorovinyl-Substituted Fischer Carbene Complexes of Tungsten and Chromium - Syntheses, Characterisation and Structures

作者：Tyrra Wieland; Yagupolskii Yurii L^*; Kirij Nataliya V; Rusanov Eduard B; Kremer Silke; Naumann Dieter

来源：European Journal of Inorganic Chemistry, 2011, 2011(12): 1961-1966.

DOI：10.1002/ejic.201001309

• Carbene complexes
• Chromium
• Tungsten
• Fluorinated ligands

Hexacarbonyltungsten and -chromium [M(CO)(6); M = W, Cr] react smoothly with perfluoroalkyl (R-f = CF3, C2F5) and tri-fluorovinyl (R-f = CF=CF2) silanes in the presence of equimolar amounts of fluoride ions with exclusive attack of one of the CO ligands to form the corresponding salts, Cat-[(CO)(5)MC(R-f) O] (Cat = [Me4N](+), [Cs(15-crown-5)(2)](+)) which after methylation represent the first hitherto unknown perfluoroorgano-substituted Fischer carbene complexes, (CO)(5)-MC(R-f)(OCH3), of those metals. The methoxy group can be easily replaced by amino functional groups as shown for the corresponding carbonyltungsten compound. The molecular structures of (CO)(5)WC(CF3)(OCH3) and (CO)(5)WC(CF3)[N(C2H5)(2)] have been elucidated by XRD measurements.

• 出版日期2011-4