translate English to French: The tris(3-hydroxy-4-pyronato)metal(III) complexes are formed insitu and these undergo nucleophilic attack by the primary amine; the appropriate tris(3-hydroxy-4-pyridinonato)metal(III) complexes are obtained.
Les complexes tris(hydroxy-3 pyronato-4)métal(III) se forment insitu et ceux-ci subissent une attaque nucléophile par l'aminé primaire; on obtient les complexes tris(hydroxy-3 pyridinonato-4(métal(III) appropriés.