
%0 Journal Article
%A Gregson, AK 
%A Doddrell, DM 
%A Bendall, MR 
%T Temperature-Dependent Isotropic Shifts in Some Paramagnetic Transition Metal Acetylacetonates
%J Australian Journal of Chemistry
%D 1979/07/01
%V 32
%N 7
%P 1407-1414
%K 
%R https://doi.org/10.1071/CH9791407
%U https://www.publish.csiro.au/paper/CH9791407 
%X A detailed analysis of the temperature dependence of the CH3 and CH isotropic shifts in V(acac)3 (Hacac = pentane-2,4-dione) and the CH3 isotropic shift in Ru(acac)3 is given. The temperature dependence of the CH3 isotropic shifts in Mn(acac)3 and Fe(acac)3 are also reported. The pseudo-contact shifts are negligible for them all except in Ru(acac)3. The contact shifts cannot be explained with a single value of the Fermi coupling constant and it is suggested that either vibrational effects or Fermi contact contributions from excited states are responsible. 
