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Abstract
Two new complex anions, [Cr(N3)(S-pdtra)]− and [Cr(N3)(edtrp)]−, were obtained in solution by N3−/HN3 anation of the aqua analogues (S-pdtra = S-propane-1,2-diamine-N,N,N′-triacetate, edtrp = ethylenediamine-N,N,N′-tripropionate). Aquation of these species in acidic media leads to the same geometrical isomers as those used for the synthesis. The aquation rate is strongly dependent upon [H] and is substantially higher in D2O than in H2O. Protonation of the coordinated azide was not observed spectrophotometrically. The rate law and activation parameters have been determined and discussed.
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