[Nd(2,6-(CH2C5H4)2C5H3N)(μ-trifluoromethanesulfonate)]2 | 412267-11-9

• 英文名称: [Nd(2,6-(CH2C5H4)2C5H3N)(μ-trifluoromethanesulfonate)]2
• CAS: 412267-11-9
• 化学式: C₃₆H₃₀F₆N₂Nd₂O₆S₂
• 分子量: 1053.25
• InChiKey: SPFYWWATICHABT-UHFFFAOYSA-L

反应信息

• 作为产物：
  描述：

  2,6-bis(methylenecyclopentadienyl)pyridine disodium salt 、 neodymium(III) trifluoromethanesufonate 以 四氢呋喃 为溶剂， 以90%的产率得到[Nd(2,6-(CH2C5H4)2C5H3N)(μ-trifluoromethanesulfonate)]2
  参考文献：
  名称：

  New Dinuclear 5-ansa-Lanthanocene Derivatives. Crystal Structures of [Ln{2,6-(CH₂C₅H₄)₂C₅H₃N}μ-O₂SOCF₃]₂ (Ln = Nd, Y, Yb) and a VT Solution NMR (¹H, ¹⁹F) Study of the Fluxional Yttrium Homologue

  摘要：

  Five homologues of the new complex series [LnL(mu-OTf)](2) with Ln = Pr (1), Nd (2), Sm (3), Y (4), Yb (5) have been prepared from [Ln(OTf)(3)] and Na2L, where L designates two cyclopentadienyl rings tethered by a 2,6-bis(methylene)pyridyl unit and -OTf the triflate (trifluoromethanesulfonate) anion. According to crystal structure analyses of 2, 4, and 5, each triflate ligand bridges two Ln ions (Ln-O-S(O)-O'-Ln'), while, owing to substantial Ln-N(pyridyl) bonding, the LnL fragments turn out to be notably rigid entities. Nevertheless, the variable-temperature (VT) H-1 NMR spectra of all complexes reveal notable fluxionality. According to a detailed VT F-19 NMR study of 4, two dinuclear isomers, differing in the trans and cis orientations, respectively, of their two L fragments, interconvert with a negligibly small entropy of activation DeltaS(double dagger). A motion reminiscent of the Berry turnstile would most plausibly explain the experimental findings.

  DOI：

  10.1021/om0104868