The impact of multi-NMR spectroscopy on the development of noble-gas chemistry

The role of nuclear magnetic resonance spectroscopy in the structural studi es of xenon and krypton species has been essential to the development of no ble-gas chemistry since the early F-19-NMR studies carried out in Ronald J. Gillespie's laboratory at McMaster University in the late 1960's and early 1970's, These early investigations of noble-gas species in strong acid med ia and subsequent multi-nuclear magnetic resonance (multi-NMR) studies util izing H-1, C-13, N-14, N-15, O-17, Se-77, Te-125, Xe-129, and Xe-121 as the observed nuclides have made possible numerous important advances of noble- pas chemistry, contributing to our knowledge and understanding of the fluor ide ion donor-acceptor behavior of noble-gas fluorides and oxide fluorides. Lewis acid properties of noble-gas species and the structures of compounds containing novel Xe-C, Xs-N, Xe-O, Kr-N, and Kr-O bonds. Trends among NMR parameters have also proven useful in assessing the formal oxidation state of xenon and the relative covalent characters of noble gas-ligand bonds. (C ) 2000 Elsevier Science S.A. All rights reserved.