Ridge-Tile-like Chiral Topology: Synthesis, Resolution, and Complete Chiroptical Characterization of Enantiomers of Edge-Sharing Binuclear Square Planar Complexes of Ni(II) Bearing Achiral Ligands

详细信息    查看全文

• 作者：Vadim A. Soloshonok ; Taizo Ono ; Hisanori Ueki ; Nicolas Vanthuyne ; Teodor Silviu Balaban ; Jochen Brck ; Heike Fliegl ; Wim Klopper ; Jean-Valre Naubron ; Tam T. T. Bui ; Alex F. Drake ; Christian Roussel
• 刊名：Journal of the American Chemical Society
• 出版年：2010
• 出版时间：August 4, 2010
• 年：2010
• 卷：132
• 期：30
• 页码：10477-10483
• 全文大小：417K
• 年卷期：v.132,no.30(August 4, 2010)
• ISSN：1520-5126

文摘

Binuclear square planar Ni(II) complexes are described, formed by two tridentate ligands with two imine-nitrogens coordinating two nickel atoms. Such complexes are synthetically readily available with great structural variety and present new types of ridge-tile-like chiral compounds that are reasonably stable in the appropriate “bent” conformation. Enantiomerically pure samples of these compounds have been obtained for the first time using HPLC with a chiral stationary phase. Absolute configurations and chiroptical properties are fully characterized by ECD, VCD, ORD spectroscopy, and theoretical calculations. These new compounds with ridge-tile-like chiral topology are configurationally reasonably stable [ΔG = 121.4 kJ mol⁻¹, t_1/2 = 14.9 h (78 °C, ethanol)], and therefore their chemistry, physical properties, and applications can be systematically studied.