Fluoro(nitrile)xenon( II ) cations, RC[triple bond, length as m-dash]N–XeF + AsF 6 –(R = H, CH 3 , CH 2 F, C 2 H 5 , C 2 F 5 , C 3 F 7 , or C 6 F 5 ); novel examples of xenon–nitrogen bonds and 129 Xe– 13 C, 129 Xe– 1 H, and 129 Xe- 14 N nuclear spin-spin couplings

A new class of Xe–N bonded compound results from the interaction of the electron lone pair of a nitrile with the Lewis acid, XeF+; the cationic adducts, RCN–XeF+, have been derived from the interaction of the appropriate nitrile with either XeF+AsF6- or Xe2F3+AsF6– in anhydrous HF at low temperature and characterized in the solid state by Raman spectroscopy (for R = H and Me) and in HF solution by 129Xe, 19F, 14N, 13C, and 1H n.m.r. spectroscopy.