Synthesis and X-ray Powder Structure of a New Pillared Layered Cadmium Phosphonate, Giving Evidence that the Intercalation of Alkylamines into Cd(O3PR)·H2O Is Topotactic

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• 作者：Florence Fredoueil ; Dominique Massiot ; Pascal Janvier ; Franz Gingl ; Martine Bujoli-Doeuff ; Michel Evain ; Abraham Clearfield ; and Bruno Bujoli
• 刊名：Inorganic Chemistry
• 出版年：1999
• 出版时间：April 19, 1999
• 年：1999
• 卷：38
• 期：8
• 页码：1831 - 1833
• 全文大小：55K
• 年卷期：v.38,no.8(April 19, 1999)
• ISSN：1520-510X

文摘

A new pillared layered phosphonate, cadmium 2-aminoethylphosphonate, Cd(O₃PC₂H₄NH₂) (1), has beensynthesized, and its structure was solved ab initio from X-ray powder diffraction data and refined by Rietveldmethods. Compound 1 is orthorhombic: space group Pna2₁, a = 15.4643(2) Å, b = 5.16512(7) Å, c = 6.27650(8) Å, and Z = 4. Its layer arrangement is similar to that in Cd(O₃PR)·H₂O, except that the water moleculecoordinated to cadmium in Cd(O₃PR)·H₂O is replaced by the nitrogen atom from the amino ends of the ethylchains borne by phosphorus of the upper and lower layers. The strong similarity of the IR, ³¹P, and ¹¹³Cd NMRdata for Cd(O₃PC₂H₄NH₂) and Cd(O₃PCH₃)·n-NH₂C₄H₉ clearly shows the topotactic character of the intercalationof n-alkylamines in the dehydrated form of Cd(O₃PR)·H₂O to yield Cd(O₃PR)·n-NH₂R'.