Synthesis and Structure of Cyclopentadienylmolybdenum Tricarbonylate Complexes of Yttrium(III) and Ytterbium(II)
摘要
The heterobimetallic complex [(GiPr)2Y{(μ2-CO)2MoCp(CO)}]2 (1) was synthesized in 72% yield by the exchange reaction of equimolar amounts of the bisguanidinato chloro yttrium complex (GiPr)2Y(μ-Cl)2· Li(THF)2 and Na[CpMo(CO)3]. The reaction of monoamidinato bis(trimethylsilylmethyl) yttrium complex AmdY(CH2SiMe3)2(THF) with 2 equiv of CpMo(CO)3H involved elimination of tetramethylsilane to afford 66% of the heterobimetallic complex [AmdY(THF)2{(μ2-CO)MoCp(CO)2(μ2-CO)2MoCp(CO)}]2 (2). The naphthalene ytterbium complex (C10H8)Yb(THF)2 reacted with CpMo(CO)3H at a molar ratio of 1:2 to produce Yb(II) heterobimetallic complex [Yb(THF)4{(μ2-CO)2MoCp(CO)}2]n (3). As shown by the X-ray diffraction data, complexes 1–3 contain a tetranuclear heterobimetallic framework Ln2Mo2, in which Y3+ or Yb2+ ions are linked to molybdenum ions through bridging carbonyl ligands, and complex 3 is a coordination polymer.