Pathway from Chain to Dimer in Cu(I) Camphor Hydrazone Complexes

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• 作者：M. Fernanda N. N. Carvalho ; M. Teresa Duarte ; Tiago A. Fernandes ; Adelino M. Galvo ; Ana M. Botelho do Rego
• 刊名：Inorganic Chemistry
• 出版年：2010
• 出版时间：November 15, 2010
• 年：2010
• 卷：49
• 期：22
• 页码：10330-10337
• 全文大小：944K
• 年卷期：v.49,no.22(November 15, 2010)
• ISSN：1520-510X

文摘

The chemical reactivity, molecular structure, and surface characteristics of Cu(I) camphor hydrazone compounds indicate that exist a structural pathway for conversion of coordination polymers into dimers and vice versa. By X-ray diffraction analysis two polymorphic forms of the chain compound [{CuCl}₂(Me₂NNC₁₀H₁₄O)]_n were identified that essentially differ in the structural arrangement and geometry of the non-linear copper atom. The characterization of the dimer complexes [{Cu(Me₂NNC₁₀H₁₄O)}₂(μ-X)₂] (X = Cl or Br) was also achieved by X-ray diffraction analysis showing the unusual arrangement of the camphor hydrazone ligands that occupy the same side of the molecule. Bond lengths and torsion angles show that one of the polymorphic forms is structurally close to the related dimer. The surface composition of the coordination polymers [{CuX}₂(YNC₁₀H₁₄O)]_n (X = Cl, Y = NMe₂, NH₂; X = Br, Y = NH₂) and dimers [{Cu(Me₂NNC₁₀H₁₄O)}₂(μ-X)₂] (X = Cl or Br) studied by X-ray Photoelectron Spectroscopy corroborate the molecular properties and the reactivity trend.