A binuclear terbium complex with 2,4,6-Trimethylbenzoate and 1,10-phenanthroline, [Tb2(TMBA)6(Phen)2], has been synthesized (TMBA=2,4,6-Trimethylbenzoic acid and phen= 1,10-phenanthroline) and characterized by IR, elemental analysis and X-ray diffraction methods. The title complex crystallizes in monoclinic system, space group P21/c with a=1.3275(2) nm, b=2.8179(5) nm, c=1.2825(2) nm, β=116.692(3)°, V=4.2862(13) nm3, Z=4, Dc=1.423 g·cm-3. There are four bridged carboxylate groups of the 2,4,6-trimethylbenzoic acid bonded to the two terbium i...