Envoyer par SMS: Metal complexes of a calix[4]arene diamide: Syntheses, crystal structures and molecular mechanics calculations on [Fe(L(1)-2H)][FeCl4] and [Er(L(1)-2H)(picrate)] (L(1)=5,11,17,23-tetra-tert-butyl-25,27-bis(diethylcarbamoylmethoxy)calix[4]arene)