An O-Vanillin-methionine Schiff Base complex with copper(Ⅱ) has been synthesized under a mild condition. The complex has been characterized by elemental analysis, UV, FT-IR, TG-DTA and XRD. The crystal structure of t...An O-Vanillin-methionine Schiff Base complex with copper(Ⅱ) has been synthesized under a mild condition. The complex has been characterized by elemental analysis, UV, FT-IR, TG-DTA and XRD. The crystal structure of the complex belongs to monoclinic, with space group C2/C, a=2.070 4(12) nm, b=1.431 9(8) nm, c=2.812 9(11) nm, β=133.15(2)°, V=6.084(5) nm 3, Z=8, D c= 0.998 Mg/m 3, F(000)=1 836, final R=0.121 8. The results revealed it is a tetranuclear copper(Ⅱ) complex.展开更多
The transition metal and alkaline earth metal tetranuclear complex Cu2Ca2L2(H2O)6·2H2O where H4L represents the Schiff base N-3-carboxylsalicylideneglycylglycine was prepared and its crystal structure was determi...The transition metal and alkaline earth metal tetranuclear complex Cu2Ca2L2(H2O)6·2H2O where H4L represents the Schiff base N-3-carboxylsalicylideneglycylglycine was prepared and its crystal structure was determined by the single-crystal X-ray diffraction method at room temperature. It crystallizes in the monoclinic system, space group C2/c. The lattice parameters are a=2.128 2(2) nm, b=1.231 73(14) nm, c=1.323 42(15) nm, β=93.619(2)°, Mr=939.81, Dc=1.803 Mg·m-3, F(000)=1 928, Z=4 with R1=0.046 6. Each copper atom is coordinated by two nitrogen atoms, one carboxylate oxygen atom and one phenolic oxygen atom, in a square-planner manner. And each calcium atom is coordinated by three water oxygen atoms, three carboxylate oxygen atoms and one phenolic oxygen atom in a distorted pentagonal bipyramid. Two pentagonal bipyramids are connected by two carboxyl groups. CCDC: 239969.展开更多
Two heterotrinuclear complexes bridging by thiocyanate were synthesized,and characterized by elemental analysis,infrared,molar conductance and thermal analysis.The studies of Variable Temperature magnetic susceptibili...Two heterotrinuclear complexes bridging by thiocyanate were synthesized,and characterized by elemental analysis,infrared,molar conductance and thermal analysis.The studies of Variable Temperature magnetic susceptibilities indicated that [Cu(1.2 pn) 2] 2[Mn(NCS) 4(H 2O) 2](NCS) 2 exhibited ferromagnetic exchange interaction and 2[Mn(NCS) 4(H 2O) 2](NCS) 2 antiferromagnetic exchange interaction.展开更多
文摘An O-Vanillin-methionine Schiff Base complex with copper(Ⅱ) has been synthesized under a mild condition. The complex has been characterized by elemental analysis, UV, FT-IR, TG-DTA and XRD. The crystal structure of the complex belongs to monoclinic, with space group C2/C, a=2.070 4(12) nm, b=1.431 9(8) nm, c=2.812 9(11) nm, β=133.15(2)°, V=6.084(5) nm 3, Z=8, D c= 0.998 Mg/m 3, F(000)=1 836, final R=0.121 8. The results revealed it is a tetranuclear copper(Ⅱ) complex.
文摘The transition metal and alkaline earth metal tetranuclear complex Cu2Ca2L2(H2O)6·2H2O where H4L represents the Schiff base N-3-carboxylsalicylideneglycylglycine was prepared and its crystal structure was determined by the single-crystal X-ray diffraction method at room temperature. It crystallizes in the monoclinic system, space group C2/c. The lattice parameters are a=2.128 2(2) nm, b=1.231 73(14) nm, c=1.323 42(15) nm, β=93.619(2)°, Mr=939.81, Dc=1.803 Mg·m-3, F(000)=1 928, Z=4 with R1=0.046 6. Each copper atom is coordinated by two nitrogen atoms, one carboxylate oxygen atom and one phenolic oxygen atom, in a square-planner manner. And each calcium atom is coordinated by three water oxygen atoms, three carboxylate oxygen atoms and one phenolic oxygen atom in a distorted pentagonal bipyramid. Two pentagonal bipyramids are connected by two carboxyl groups. CCDC: 239969.
文摘Two heterotrinuclear complexes bridging by thiocyanate were synthesized,and characterized by elemental analysis,infrared,molar conductance and thermal analysis.The studies of Variable Temperature magnetic susceptibilities indicated that [Cu(1.2 pn) 2] 2[Mn(NCS) 4(H 2O) 2](NCS) 2 exhibited ferromagnetic exchange interaction and 2[Mn(NCS) 4(H 2O) 2](NCS) 2 antiferromagnetic exchange interaction.
