Ligand substitution reactions in trivalent lanthanum and aluminium acetylacetonates characterization of mixed ligand complexes

ABSTRACT

Neutral M[acac][3][M = La[III] or Al[Ill], Hacac = acetylacetone] reacts with pyridine-2,6-dicarboxylic acid [H2pdc], and gives [pdc]Al[acac] H[2]O and [pdc]La[acac]. 4H[2]O. Similar reaction with trichloroacetic acid yields [CCI3000]SI[acac]2. H[2]O, and [CCI3000xCH3C00]La[acac]. H[2]O, in which the ligand-substitution reaction is accompanied by decomposition of a coordinated acetylacetonate to acetate anion. Farther reaction of [CC13000]Al[acacn H2O with dichloroacetic acid produces the mixed chloroacetates [CCI3000XCHCI[2]COO]A1[acac]. 3H[2]O