
%0 Journal Article
%A Page, CT 
%A Fergusson, JE 
%T Dynamic nuclear magnetic resonance study of some ruthenium nitrosyl chalcogen complexes [Ru(NO)X<sub>3</sub>(RR'E)<sub>2</sub>] (X = Cl, Br; E = S, Se)
%J Australian Journal of Chemistry
%D 1983/05/01
%V 36
%N 5
%P 855-862
%K 
%R https://doi.org/10.1071/CH9830855
%U https://www.publish.csiro.au/paper/CH9830855 
%X The n.m.r. spectra of the complexes [Ru(NO)X3L2] (where X = Cl, Br; L = Et2S,EtPhS, Pr2S,(PhCH2)2S, Et2Se EtPhSe) have been investigated over the temperature range 200-375 K. The resonance multiplet, assigned to the methylene protons, changes from a quartet at high temperatures to a coalesced peak and then a series of quartets at lower temperatures. The results may be explained by inversion about the S or Se atom; the spectra at low temperatures correspond to an ABX3 spin system (for ethyl) and at high temperature to a A2X3 spin system. From computer simulation of the spectra the rates of inversion have been determined and hence the energy barrier to inversion (54-75 kJ mol-1) and free energy of activation (54-79 kJ mol-1). 
