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Routine solution reaction of Gd3+ and p-phenylenediamine-N,N,N′,N′-tetraacetic acid (p-PhDTA) yields a dinuclear complex [Gd2(ox)(p-PhDTA)2(H2O)10]·6H2O (ox = oxalate), which was characterized by single-crystal X-ray diffraction (MoKα radiation, = 0.