A Novel Three-Dimensional Network Constructed from Tetramolybdate Clusters Linked via Two Types of Copper Complex Fragments: Synthesis, Characterization, and Magnetic Behavior of [{CuII(2,2-bpy)}{CuII(IN)2}{Mo4O12(OH)2}]

A novel three-dimensional copper molybdate with mixed ligands, [{CuII(2,2ʹ-bpy)}{CuII(IN)2}{Mo4O12(OH)2}] (IN- = isonicotinate ion, 2,2ʹ-bpy = 2,2ʹ-bipyridine), 1, has been hydrothermally synthesized and structurally characterized, and this compound is built from an unprecedented tetranuclear molybdenum oxide cluster covalently bonded to two types of copper complex fragments, {CuII(2,2ʹ-bpy)}2+ and {CuII(IN)2}, via terminal oxygen atoms of {MoO6} octahedra. Crystal data for compound 1: monoclinic, space group C2/c, a = 16.4755 (angstrom), b = 10.3714 (angstrom), c = 17.4382 (angstrom), (alpha)= 90.0000 , (beta)= 94.8098 , (gamma)= 90.0000 ; V = 2969.24 (angstrom)^3; Z = 2. Variable temperature magnetic susceptibility indicates that both ferromagnetic and antiferromagnetic interactions exist in 1.