The exchange D + H of 1 was found to be submit to general acid catalysis (GLB = 0.6). The rates of protonation of primary and secondary diazocarbonyl compounds of similar structure were found to be quite similar, in spite of difference in mecanism (A-2 and A-SEZ, respectively). Les diazoiques aliphatiques primaires dCsactivQOn sait que les rCactions de protonation du carbone sont relativement lentes, A l'encontre des protonations trks rapides de l'oxygkne ou de l'azote caracterisant les r6actions normales de prCCquilibre. En effet, dCjk les homologues secondaires des diazoiques susmentionnCs prCsentent la protonation du carbone normale dCterminant

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