Three-Dimensional Organic/Inorganic Hybrid Materials Constructed from One-Dimensional Copper Diamine Coordination Polymers Linked by Bridging Oxoanion Tetrahedra: [Cu(dpe)(MoO₄)] and [Cu(dpe) (SO₄) (H₂O)] (dpe = 1,2-trans-(4-pyridyl)ethene)

The hydrothermal reaction of CuSO₄·5H₂O, dpe, MoO₃, and water in the mole ratio 1:2: 2:900 at 120 °C for 111 h yielded [Cu(dpe)(MoO₄)] (1). Upon omitting the molybdate component, the reaction of CuS0₄·5H₂O, dpe and water in the mole ratio 1:1:1111 at 120 °C for 72 h yielded [Cu(dpe)(SO₄)(H₂O)] (2). The structure of 1 is constructed from {Cu(dpe)}²⁺ linear chains bridged through {MoO₄}^2- tetrahedra into a three-dimensional framework, while that of 2 consists of {Cu(dpe)}²⁺ chains bridged through {SO₄}^2- tetrahedra. However, while the (MoO₄}^2- units of 1 adopt the η³-coordination mode, each linking three adjacent chains, the {SO₄}^2- units of 2 assume η2-coordination and bridge only two neighboring chains. These differences in {EO₄}^2- coordination modes are reflected in the dramatically different three-dimensional structures displayed by 1 and 2. Crystal data: C₁₂H₁₀CuMoN₂O₄ (1), orthorhombic Pbcn, a = 22.0462(1) Å, b = 12.2957(2) Å, c = 9.7560(2) Å, V = 2644.59(7) Å,³ Z = 8, D_calc = 2.038 g cm^-3; 3202 reflections, R1 = 0.056. C₁₂H₁₂CuN₂O₅S (2), monoclinic Pn, a = 7.2851(2) Å, b = 9.9062(3) Å, c = 9.1407(2) Å, β = 98.207(1)°, V = 652.91(3) À, Z = 2, D_calc = 1.830 g cm^-3; 1968 reflections, R1 = 0.027.