Mn^II Complexes with a Novel Triacid as Ligand: Synthesis and Characterization

A novel aromatic tricarboxylic acid of 4,4′-(2-carboxypropane-1,3-diyl)dibenzoic acid (H₃L) was used to prepare two Mn^II complexes of [Mn₃(L)₂(bpy)₂]_n (1) and [Mn₃(L)₂(phen)₂]_n (2), where bpy = 2,2′-bipyridine and phen = 1,10-phenanthroline. The single crystal structures, thermal stability, and the magnetism of 1 and 2 were measured and discussed in this article. According to the magnetism measurements, the Curie constants and the Weiss constants should be 12.29 K·cm³·mol⁻¹ (g = 1.94, S = 5/2) and −9.80 K for 1 and 11.11 K·cm³·mol⁻¹ (g = 1.83, S = 5/2) and −9.26 K for 2, respectively.