The influence of anions and intermolecular aromatic interactions on the orientation of one dimensional silver(I) co-ordination polymers has been studied. Reaction of AgX with 2,7-diazapyrene (diaz) (X = BF4− or NO3−), 1,4-bis(4-pyridyl)butadiyne (pybut) (X = BF4−, NO3−, PF6− or MeCO2−), 4,4′-bipy (X = BF4−) or 1,4-bis(4-pyridylethynyl)phenylene (pyphe) (X = PF6−) afforded products of general formula [Ag(ligand)]X}∞. All of the products have been structurally characterised by single crystal X-ray diffraction confirming that they exist as one-dimensional linear chain co-ordination polymers. The arrangement of the chains with respect to each other in the solid state is discussed and evaluated in terms of the relative co-ordinating ability of the anion used and the tendency of the N-donor ligand to adopt intermolecular aromatic interactions. For the complexes of diaz the overriding force in controlling chain orientation was shown to be π–π interactions between diaz ligands on adjacent chains. In the case of the pybut complexes the most dominant forces were shown to be metal–anion interactions with aromatic π–π interactions and Ag⋯Ag interactions playing a less influential role. In the case of [Ag(pyphe)]PF6}∞ Ag⋯aromatic interactions are important in the overall arrangement of adjacent chains.
研究了阴离子和分子间芳香相互作用对一维
银(I)配合物聚合物取向的影响。将AgX与2,7-二氮杂
芘(diaz)(X = BF4^- 或 NO3^-)、1,4-双(4-
吡啶基)
丁二炔(pybut)(X = BF4^-, NO3^-, PF6^- 或 MeCO2^-)、
4,4'-联吡啶(X = BF4^-)或1,4-双(4-
吡啶基
乙炔基)苯(pyphe)(X = PF6^-)反应,得到了通式为[Ag(
配体)]X}∞的产品。通过单晶X射线衍射对所有产品进行了结构表征,确认它们以一维线性链式配位聚合物的形式存在。在固态下,链与链之间的排列根据所用阴离子的相对配位能力和N供体
配体形成分子间芳香相互作用的倾向进行了讨论和评估。对于diaz配合物,控制链取向的主导力量被证明是相邻链上的diaz
配体之间的π-π相互作用。对于pybut配合物,最主导的力量被证明是
金属-阴离子相互作用,而芳香π-π相互作用和Ag⋯Ag相互作用的作用较小。在[Ag(pyphe)]PF6}∞的情况下,Ag⋯芳香相互作用在相邻链的整体排列中很重要。