Construction of a Square-Planar Molecular Box: Self-Assembly of Palladium(II) Complexes of 3,6,9,16,19,22-Hexaazatricyclo[22.2.2.211,14]triacon-11,13,24,26(1),27,29-hexaene through Hydrogen

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• 作者：Weijiang He ; Fang Liu ; Chunying Duan ; Zijian Guo ; Shaozhen Zhou ; Yongjiang Liu ; and Longgen Zhu
• 刊名：Inorganic Chemistry
• 出版年：2001
• 出版时间：December 31, 2001
• 年：2001
• 卷：40
• 期：27
• 页码：7065 - 7071
• 全文大小：135K
• 年卷期：v.40,no.27(December 31, 2001)
• ISSN：1520-510X

文摘

Binuclear palladium(II) complexes of the macrocyclic polyamine 3,6,9,16,19,22-hexaazatricyclo[22.2.2.2^11,14]triacon-11,13,24,26(1),2 7,29-hexaene (L) are used to construct molecules having special shapes. In this studytwo binuclear palladium(II) complexes [Pd₂LI₂]I₂ and [Pd₂LCl₂](NO₃)₂·H₂O are synthesized and structurallycharacterized. X-ray crystallography shows that both complexes exist as one-dimensional chains formed viaintermolecular hydrogen-bonding N(3)-H(3C)---X in which X is I and Cl. Moreover, the ligands in both complexesadopt a boatlike conformation that may facilitate the formation of the tetranuclear complex. The cationic aquacomplex [Pd₂L(H₂O)_m(NO₃)_n]^(4-n)+, obtained by the treatment of [Pd₂LI₂]I₂ and [Pd₂LCl₂]Cl₂ with AgNO₃, isused as a building block for the construction of a tetranuclear palladium(II) complex [Pd₄L₂(C₂O₄)₂](NO₃)₄·6H₂O. X-ray crystallography shows that the tetranuclear complex forms an open, hydrophobic box. These molecularboxes are connected via the hydrogen bond N(3)-H(3C)---O(4B) (symmetry code B: x, 1 + y, z) into a one-dimensional chain. A two-dimensional structure is formed via - stacking of the plane defined by C6 to C11in the one chain and its symmetry-related plane (symmetry code C: -x, -1 - y, 2 - z) in another chain. Thisstudy exemplifies a new method for the assembly of molecular boxes using a macrocyclic ligand.