Two cupric complexes containing methylbenzoic acid have been prepared and crystallized by solvent evaporation method in DMF. The single-crystal X-ray crystallographic analysis reveals that they are dicaryon complexes....Two cupric complexes containing methylbenzoic acid have been prepared and crystallized by solvent evaporation method in DMF. The single-crystal X-ray crystallographic analysis reveals that they are dicaryon complexes. Complex I with formula of [Cu2（m- MBA）4DMF2] crystallizes in monoclinic with space group of P21/c and complex 2 with formula of [Cuz（o-MBA）ffo-phen）2]·NO3·H2O crystallizes in triclinic with space group of P I. The weak interactions including C-H...O hydrogen bonds, C-H…π interactions and π-π stacking in the structures of two complexes are observed from the X-ray crystallographic data. In addition, there are still classical hydrogen bonds in 2. The different strength of intermolecular interaction in the structure is reflected on their different thermal stability measured by thermal gravimetric analysis and 2D-1R correlation spectroscopy of two complexes. The study of weak interactions is meaningful to provide supporting data for supramolecular chemistry theory and potential applications in molecular biology.展开更多
The reaction ofphenyl 2-pyridyl ketoxime （PhPyCNOH） with Cu（NO3）2·3H2O has led to a triangular complex Cu3（OH）（PhPyCNO）3（NO3）·NO3·H2O 1 containing the [Cu3（μ2-OH）]5＋ core and possessing th...The reaction ofphenyl 2-pyridyl ketoxime （PhPyCNOH） with Cu（NO3）2·3H2O has led to a triangular complex Cu3（OH）（PhPyCNO）3（NO3）·NO3·H2O 1 containing the [Cu3（μ2-OH）]5＋ core and possessing the very rare inverse 9-metallacrown-3 motif created by the bridging oximate groups. Crystallographic data for 1： C36H30N8O11CU3, Mr = 941.30, monoclinic, space group C2/c, a = 18.815（9）, b = 33.888（15）, c = 14.307（7） A, β = 118.945（6）°, V= 7983（6） A3, Z = 8, Dc = 1.566 g/cm3, μ = 1.652 mm^-1, F（000） = 3816, R= 0.0644 and wR= 0.1393 for 3468 observed reflections （I〉 2σ（I））. Preliminary variable-temperature magnetic susceptibility studies reveal an antiferromagnetically-coupled system showing antisymmetrie exchange.展开更多
基金Science and Technology Project of Education Department of Fujian Province(JA11286)Science and Technology Development Fund of Fuzhou University(2010-XQ-09)
文摘Two cupric complexes containing methylbenzoic acid have been prepared and crystallized by solvent evaporation method in DMF. The single-crystal X-ray crystallographic analysis reveals that they are dicaryon complexes. Complex I with formula of [Cu2（m- MBA）4DMF2] crystallizes in monoclinic with space group of P21/c and complex 2 with formula of [Cuz（o-MBA）ffo-phen）2]·NO3·H2O crystallizes in triclinic with space group of P I. The weak interactions including C-H...O hydrogen bonds, C-H…π interactions and π-π stacking in the structures of two complexes are observed from the X-ray crystallographic data. In addition, there are still classical hydrogen bonds in 2. The different strength of intermolecular interaction in the structure is reflected on their different thermal stability measured by thermal gravimetric analysis and 2D-1R correlation spectroscopy of two complexes. The study of weak interactions is meaningful to provide supporting data for supramolecular chemistry theory and potential applications in molecular biology.
基金supported by the National Natural Science Foundation of China(No.20971004)the Natural Science Foundation of Anhui Provincial Education Commission(No.KJ2010A229)
文摘The reaction ofphenyl 2-pyridyl ketoxime （PhPyCNOH） with Cu（NO3）2·3H2O has led to a triangular complex Cu3（OH）（PhPyCNO）3（NO3）·NO3·H2O 1 containing the [Cu3（μ2-OH）]5＋ core and possessing the very rare inverse 9-metallacrown-3 motif created by the bridging oximate groups. Crystallographic data for 1： C36H30N8O11CU3, Mr = 941.30, monoclinic, space group C2/c, a = 18.815（9）, b = 33.888（15）, c = 14.307（7） A, β = 118.945（6）°, V= 7983（6） A3, Z = 8, Dc = 1.566 g/cm3, μ = 1.652 mm^-1, F（000） = 3816, R= 0.0644 and wR= 0.1393 for 3468 observed reflections （I〉 2σ（I））. Preliminary variable-temperature magnetic susceptibility studies reveal an antiferromagnetically-coupled system showing antisymmetrie exchange.
