Synthesis, Characterization, and Coordination Chemistry of a New Geometrically Hindered Trifunctional Ligand, 4,5-Bis(diphenylphosphino)-sym-octahydroacridine N,P,P'-Trioxi

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• 作者：Xin-Min Gan ; Sahrah Parveen ; Wayne L. Smith ; Eileen N. Duesler ; and Robert T. Paine
• 刊名：Inorganic Chemistry
• 出版年：2000
• 出版时间：October 2, 2000
• 年：2000
• 卷：39
• 期：20
• 页码：4591 - 4598
• 全文大小：144K
• 年卷期：v.39,no.20(October 2, 2000)
• ISSN：1520-510X

文摘

The ligand 4,5-bis(diphenylphosphino)-sym-octahydroacridine N,P,P'-trioxide (10) was obtained from a multistepsynthesis and characterized by spectroscopic methods, and two crystal forms were examined by single-crystalX-ray diffraction techniques. The coordination behavior of the trifunctional ligand toward La(NO₃)₃ and Nd(NO₃)₃ was examined, and the molecular structures of the complexes La(10)(NO₃)₃·MeOH and Nd(10)(NO₃)₃·MeOH were determined by single-crystal X-ray diffraction methods. The molecules form chains along the z axisin which the ligand bonds in a bidentate mode to one La(NO₃)₃ or Nd(NO₃)₃ by using the N-O and one of theP=O donor centers. The second P=O donor group in the ligand bridge bonds to a second La(10)(NO₃)₃ or Nd(10)(NO₃)₃ unit. The coordination behavior of 10 contrasts with that of the related but structurally more flexibletrifunctional ligand 2,6-bis[(diphenylphosphino)methyl]pyridine N,P,P'-trioxide, which acts as a tridentate ligandtoward f-element ions.