“…Manganese complexes with carboxylate ligands have received extensive attention due to the fact that carboxylates are good candidates for the investigation of exchange-coupling interactions between adjacent metal ions (Soler et al, 2004). Trichloroacetic acid, a type of carboxylate organic ligand, and its coordination chemistry, have received a great deal of attention (Dell'Amico et al, 2000;Ng, 2004;Gomez-Segura et al, 2005;Dey et al, 2004). However, there are only a few reports on transition metal complexes with trichloroacetate and rigid chelating organic ligands such as 1,10-phenanthroline or 2,2bipyridine (de Boer et al, 2005;Yin et al, 2005).…”