Helical Complexes of Chiral Quaterpyridines – Mononuclear Cu
<sup>II</sup>
and Dinuclear Cu
<sup>I</sup>
Complexes
作者:Ho‐Lun Yeung、Kiu‐Chor Sham、Wai‐Yeung Wong、Chun‐Yuen Wong、Hoi‐Lun Kwong
DOI:10.1002/ejic.201100630
日期:2011.11
series of chiral helical copper–quaterpyridine complexes were prepared by reacting chiral ligands L1–4 with CuI and CuII precursors. The CuII complexes, [Cu(L)(H2O)(ClO4)2] or [Cu(L)(ClO4)2], were studied by ESI-MS, elemental analysis, and CD spectroscopy, and the CuI complexes, [Cu2(L)2](PF6)2, were examined by NMR, ESI-MS, elemental analysis, and CD spectroscopy. The crystal structures of [Cu(L1)(H2O)(ClO4)](ClO4)
通过将手性配体 L1-4 与 CuI 和 CuII 前体反应制备了两个系列的手性螺旋铜-四吡啶配合物。CuII 配合物 [Cu(L)(H2O)(ClO4)2] 或 [Cu(L)(ClO4)2] 通过 ESI-MS、元素分析和 CD 光谱进行研究,而 CuI 配合物 [Cu2 (L)2](PF6)2,通过核磁共振、ESI-MS、元素分析和CD 光谱检查。[Cu(L1)(H2O)(ClO4)](ClO4)和[Cu(L3)(ClO4)2]的晶体结构由X射线衍射确定。它们是单体的、扭曲的八面体配合物,在四个赤道位置配位四联吡啶配体,在顶端位置配位一或两个高氯酸盐。还确定了 [Cu(L1m)(H2O)(ClO4)](ClO4) 的晶体结构,它具有非手性四联吡啶配体 L1m,即 L1 的内消旋形式。[Cu(L1)(H2O)(ClO4)](ClO4) 和 [Cu(L1m)(H2O)(ClO4)](ClO4)