Complexes [Rh (1, 5-COD)(Q)] have been prepared by the reaction between [Rh (1, 5-COD) Cl] 2 (1, 5-COD= 1, 5-cyclooctadiene) and HQ (where HQ= 1-phenyl-3-methyl-4-R-pyrazol-5- one: R= 2-thenoyl (HQs), 2-furanoyl (HQo) or tert-butylacetyl (HQT).[Rh (1, 5-COD)(Q)] react with N2-donor ligands such as 1, 10-phenanthroline (phen) or 2, 2-bipyridyl (bipy) yielding ionic compounds [Rh (1, 5-COD)(N2-donor)] Q. The substitutional lability of 1, 5-COD in [ ...