Hydrothermal synthesis of organic - Inorganic hybrid materials: Network structures of the bimetallic oxides [M(Hdpa)₂V₄O₁₂] (M = Co, Ni, dpa = 4,4′-dipyridylamine)

The hydrothermal reactions of MCl₂·6H₂O (M = Co, Ni) NaVO₃, 4,4′-dipyridylamine (dpa), and H₂O yield materials of the type [M(Hdpa)₂V₄O₁₂] (M = Co (1), Ni (2)). The two-dimensional structures of 1 and 2 are constructed from bimetallic oxide networks {MV₄O₁₂}_n^2n- with monodentate Hdpa† projecting the protonated ring into the interlamellar region. The oxide network may be described as ruffled chains of corner-sharing {VO₄} tetrahedra linked by {NiO₄N₂} octahedra into the two-dimensional assembly. Crystal data: C₁₀H₁₀Co_0.5N₃O ₆V₂ (1), monoclinic P2₁/c, a = 10.388(1) Å, b = 7.6749(7) Å, c = 16.702(2) Å, β = 102.516(1)°, Z = 4. C₁₀H₁₀N_3- Ni_0.5O₆V₂ (2), monoclinic, P2₁/c, c = 10.3815(2) Å, b = 7.7044(2) Å, c = 16.6638(4) Å, β = 102.573(1)° Z = 4.