Crystal structures of neodymium (III) and dysprosium (III) nitrate complexes with the new ligand N, N’-dimethyl-N, N’-diphenyladipamide (mpaa) has been determined. Both complexes are triclinic with space group Pī, ...Crystal structures of neodymium (III) and dysprosium (III) nitrate complexes with the new ligand N, N’-dimethyl-N, N’-diphenyladipamide (mpaa) has been determined. Both complexes are triclinic with space group Pī, formula [C22H30N5NdO12S]2 1 [C42H54N7DyO14S 2] Mr = 1465.62[1075.48], a = 8.541(1)[9.711(2)], b = 11.915(1)[16.017(3)], c = 15.906(1) [16.686(3)] ?, α =107.22(1)[109.600(1)], β = 98.12(1)[92.50(1)], γ = 99.78(1) [96.22(1)]°, V = 1491.8(2)[2421.7(8)] ?3, Dc = 1.631[1.475] g·cm-3, Z = 1[2], F(000) = 738[1098], μ=0.71073cm-1; R=0.0261[0.0364], wR=0.0611[0.0857] reflections with I>2σ(I). Complex (1) is dinuclear, in which two Nd(III) ions are double-bridged by two mpaa ligands. And Dy(mpaa)2(dmso)(NO3)3 (2) (dmso= dimethylsulfoxide) is a mononuclear complex, in which one of the two C=O groups in MPAA is uncoordinated. In the two above complexes, each Ln(III) ion is nine-coordinated including three bidenate nitrates, one dmso molecule and two carbonyl oxygens from two different mpaa ligands. Neutral monodentate dmso enters the coordination sphere to meet the geometric requirements. When the number of methylene between O=C…C=O in diamides of the type (R1R2NCO)2(CH2)n was increased, the ligand prefers to act as a bridging reagent rather than a chelate.展开更多
An octameric water moiety which consists of a chairlike water hexamer and two pendent water molecules in the 1,4-diaxial positions and shows a similar structure to the hydrocarbon （lr,4r）-1,4-dimethylcyclohexane, is...An octameric water moiety which consists of a chairlike water hexamer and two pendent water molecules in the 1,4-diaxial positions and shows a similar structure to the hydrocarbon （lr,4r）-1,4-dimethylcyclohexane, is unambiguously trapped in a 2D Cu（II） mixed-ligand coordination polymer, {[Cu2（bpp）2（HzO）2（bpda）2]＇6H2O}n （1） （bpp = 1,3-bis（4-pyridyl）propane and H2bpda = 2,2＇-biphenyldicarboxylic acid）. The water octamer can be extended into a hybrid carboxylate-water decamer when carboxylic oxygen atoms from bpda2- are involved. Interestingly, the present hybrid decamer bears a similar structural topology to a butterfly （H2O）10 cluster. The reversible dehydration/hydration of 1 is determined by X-ray powder diffraction studies.展开更多
基金the Key Laboratory of Organic Synthesis, Jiangsu Province.
文摘Crystal structures of neodymium (III) and dysprosium (III) nitrate complexes with the new ligand N, N’-dimethyl-N, N’-diphenyladipamide (mpaa) has been determined. Both complexes are triclinic with space group Pī, formula [C22H30N5NdO12S]2 1 [C42H54N7DyO14S 2] Mr = 1465.62[1075.48], a = 8.541(1)[9.711(2)], b = 11.915(1)[16.017(3)], c = 15.906(1) [16.686(3)] ?, α =107.22(1)[109.600(1)], β = 98.12(1)[92.50(1)], γ = 99.78(1) [96.22(1)]°, V = 1491.8(2)[2421.7(8)] ?3, Dc = 1.631[1.475] g·cm-3, Z = 1[2], F(000) = 738[1098], μ=0.71073cm-1; R=0.0261[0.0364], wR=0.0611[0.0857] reflections with I>2σ(I). Complex (1) is dinuclear, in which two Nd(III) ions are double-bridged by two mpaa ligands. And Dy(mpaa)2(dmso)(NO3)3 (2) (dmso= dimethylsulfoxide) is a mononuclear complex, in which one of the two C=O groups in MPAA is uncoordinated. In the two above complexes, each Ln(III) ion is nine-coordinated including three bidenate nitrates, one dmso molecule and two carbonyl oxygens from two different mpaa ligands. Neutral monodentate dmso enters the coordination sphere to meet the geometric requirements. When the number of methylene between O=C…C=O in diamides of the type (R1R2NCO)2(CH2)n was increased, the ligand prefers to act as a bridging reagent rather than a chelate.
基金supported by the National Natural Science Foundation of China (50971063,21053001)the Natural Science Foundation of Fujian Province (2011J01047,2003F006,2010J01042)+1 种基金the Scientific Research Foundation for the Returned Overseas Chinese Scholars,State Education Ministry of Chinathe Startup Package Funding of Huaqiao University (10BS210 and 11BS102)
文摘An octameric water moiety which consists of a chairlike water hexamer and two pendent water molecules in the 1,4-diaxial positions and shows a similar structure to the hydrocarbon （lr,4r）-1,4-dimethylcyclohexane, is unambiguously trapped in a 2D Cu（II） mixed-ligand coordination polymer, {[Cu2（bpp）2（HzO）2（bpda）2]＇6H2O}n （1） （bpp = 1,3-bis（4-pyridyl）propane and H2bpda = 2,2＇-biphenyldicarboxylic acid）. The water octamer can be extended into a hybrid carboxylate-water decamer when carboxylic oxygen atoms from bpda2- are involved. Interestingly, the present hybrid decamer bears a similar structural topology to a butterfly （H2O）10 cluster. The reversible dehydration/hydration of 1 is determined by X-ray powder diffraction studies.
