Hydrothermal syntheses and crystal structures of Ni(II), Co(II), and Cu(II), bis(trans-4-pyridylacrylate) interpenetration networks

Three metal-organic polymeric networks, Ni(C8H6NO2)(2) (H2O)(2) (1), Co(C8H 6NO2)(2) (2), and Cu(C8H6NO2)(2)(H2O)(2) (3), were synthesized by the hydro thermal method. Single-crystal X-ray analysis revealed that within these co mpounds metal centers are linked through trans-4-pyridylacrylate ligands to form interpenetrating infinite networks. The Ni(II) and Cn(II) compounds p ossess an overlay of interpenetrating square grid layers, whereas the Co(II ) compound possesses interpenetrating diamondoid networks. Comparing these three compounds, the formation of cavities potentially for guest molecule i nclusion within the interpenetrating networks could be achieved by taking a dvantage of the coordination nature of metals. Crystal structures of all th ree compounds were determined by single-crystal X-ray diffraction methods a nd solved by direct method. Crystal data for 1: orthorhombic, space group P bcn, a = 13.735(3) Angstrom, b = 6.995(2) Angstrom, c = 16.723(3) Angstrom, V = 1606.7(6) Angstrom (3), Z = 4, final refinement (I > 2 sigma (I)): R1 = 0.0296, wR2 = 0.0843. Crystal data for 2: monoclinic, space group Cc, a b = 21.2838(16) Angstrom, c = 8.5504(7) Angstrom, beta = 130.5210(10)degrees , V = 1600.8(2) Angstrom (3), Z = 4, final refinement (I > 2 sigma (I)): R1 = 0.0347, wR2 = 0.0879. Crystal data for 3: orthorhombic, space group Pbcn , a = 13.6844(13) Angstrom, b = 7.5053(8) Angstrom, c = 15.929(4) Angstrom, V = 1636.0(5) Angstrom (3), Z = 4, final refinement (I > 2 sigma (I)), R1 = 0.0299, wR2 = 0.0787. (C) 2001 Academic Press.