Abstract
Dynamic n.m.r. spectra have been obtained for adducts of the titie complex [Pr(fod)3] with substituted ethylenediamines. Four exchange processes have been characterized or observed: (i) intermolecular exchange; (ii) ring opening; (iii) ring inversion; and (iv) intramolecular rearrangement(s) of the eight-co-ordinate complex. Barriers to ring inversion are reported. For the NN′-dimethylethylenediamine adduct, DL. and meso isomers are present in a 3.0 : 1 ratio.
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