Electron donation capability of the trimethylsiloxy substituent as studied by photoelectron spectroscopy and electron spin resonance of polysubstituted benzene derivatives
作者:Wolfgang Kaim
DOI:10.1016/0022-328x(85)87137-0
日期:1985.2
Poly-trimethylsiloxy substituted benzenes have been studied by UV photoelectron spectroscopy (PES). The observed ionization energies show that the OSiMe3 group is a stronger donor than the methyl group but a weaker donor than OMe or CH2SiMe3 groups. Highly substituted derivatives yield radical cations on oxidation with AlCl3/CH2Cl2/Me3SiCl; the electron spin resonance (ESR) as well as the PE results
聚三甲基甲硅烷氧基取代的苯已通过紫外光电子能谱(PES)进行了研究。观察到的电离能表明,OSiMe 3基团比甲基基团更强,但比OMe或CH 2 SiMe 3基团更弱。高度取代的衍生物在用AlCl 3 / CH 2 Cl 2 / Me 3 SiCl氧化时可产生自由基阳离子。电子自旋共振(ESR)和PE结果表明,对于自由基阳离子基态,n O /π相互作用占主导地位,几乎没有或没有σOSi /π超共轭。
Linking of metal centres through boryl ligands: synthesis, spectroscopic and structural characterisation of symmetrically bridged boryl complexes
作者:Simon Aldridge、Richard J. Calder、Andrea Rossin、Anthony A. Dickinson、David J. Willock、Cameron Jones、David J. Evans、Jonathan W. Steed、Mark E. Light、Simon J. Coles、Michael B. Hursthouse
DOI:10.1039/b200695m
日期:2002.4.26
Dinuclear species containing iron centres linked via various bridging boryl ligands have been synthesised and a combination of crystallographic, computational and spectroscopic (Mössbauer, IR, Raman) techniques have been used to probe the bonding in these complexes.