Dinuclear and Tetranuclear Gold−Nitrogen Complexes. Solvent Influences on Oxidation and Nuclearity of Gold Guanidinate Derivatives
作者:Ahmed A. Mohamed、Andrew P. Mayer、Hanan E. Abdou、Michael D. Irwin、Lisa M. Pérez、John P. Fackler
DOI:10.1021/ic701399s
日期:2007.12.1
tetranuclear Au(I) complex, [Au4(hpp)4]. The tbo ligand, Htbo = 1,4,6-triazabicyclo[3.3.0]oct-4-ene a bicyclic 5,5 guanidine system, behaved differently from the hpp ligand, and only the colorless tetranuclear gold complex, [Au4(tbo)4], formed in THF, CH2Cl2, or ethanol. The X-ray structure of the oxidized species, [Au2(hpp)2Cl2], shows a Au(II)-Au(II) distance of 2.4752(9) A, the shortest gold-gold bond reported
Hhpp配体的钠盐Hhpp = 1,3,4,6,7,8-六氢-2H-嘧啶基[1,2-a]嘧啶(6,6双环胍系统)与(THT)反应在THF或CH2Cl2中的AuCl(THT =四氢噻吩)形成Au(II)络合物[Au2(hpp)2Cl2]。Au(II)配合物是通过用溶剂(例如CH2Cl2)氧化或Au(I)歧化并伴随Au(0)形成而形成的。在乙醇中的反应得到无色四核Au(I)络合物[Au4(hpp)4]。tbo配体Htbo = 1,4,6-三氮杂双环[3.3.0] oct-4-ene双环5,5胍系统,其行为与hpp配体不同,只有无色四核金络合物[Au4(tbo )4],在THF,CH2Cl2或乙醇中形成。氧化物种[Au2(hpp)2Cl2]的X射线结构显示Au(II)-Au(II)距离为2.4752(9)A,[(PhCOO)6Au4(hpp)2Ag2]在此处表征之前报告的最短金金键,Au(II)-Au(II)=