N,N-Bis(2-pyridylmethyl)-amine-N-ethyl-2-pyridine-2-carboxamide was synthesized and characterized according to the literature. At 25 ℃, I=0.1 mol/L KNO 3, the stability constants of the binary system formed by the li...N,N-Bis(2-pyridylmethyl)-amine-N-ethyl-2-pyridine-2-carboxamide was synthesized and characterized according to the literature. At 25 ℃, I=0.1 mol/L KNO 3, the stability constants of the binary system formed by the ligand with metal ions in ethanol aqueous solution were studied by pH potentiometric titration and the appropriate structures with respect to the titration species were proposed. The results show that the stability order of divalent metals binding to the ligand is Co<Ni>Cu<Zn which does not conform to the order of the Irving-Williams series. Then the abnormal property of copper complex is discussed.展开更多
A Zn(Ⅱ) complex with nitronyl nitroxide radicals [Zn(NIT3Py)2Cl2](1)(NIT3Py=2-(3'-pyridinyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) has been synthesized and structurally characterized by X-ray diffraction...A Zn(Ⅱ) complex with nitronyl nitroxide radicals [Zn(NIT3Py)2Cl2](1)(NIT3Py=2-(3'-pyridinyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) has been synthesized and structurally characterized by X-ray diffraction crystal structure determination method.The complex has a mononuclear-metal structure in which each Zn(Ⅱ) ion adopts a distorted tetrahedral geometry and is coordinated by two Cl-anions and two pyridyl-N atoms from two NIT3Py radical ligands.The magnetic measurements show the weak antiferromagnetic interaction between the nitroxide radicals through the diamagnetic Zn(Ⅱ) ion.CCDC:292363.展开更多
A novel ligand N - ethyl - 1,10 - phenanthroline - 2 - methanamine and its Ni(Ⅱ)complex have been synthesized.The crystal structure of the complex has been determined by X - ray diffraction method.The Ni(Ⅱ)is five -...A novel ligand N - ethyl - 1,10 - phenanthroline - 2 - methanamine and its Ni(Ⅱ)complex have been synthesized.The crystal structure of the complex has been determined by X - ray diffraction method.The Ni(Ⅱ)is five - coordi - nated by three nitrogen atoms from the ligand and two Cl - anions in a distorted trigonal bipyramidal environment:the N(2),Cl(1)and Cl(2)in equatorial plane;the N(1)and N(3)in axial positions.The UV - spectra and IR - spectra of the ligand and its Ni(Ⅱ)complex were recorded and discussed.The thermodynamic properties of the ligand with various bivalent metals were studied by potentiometric titrations and the order of the stability constants is in a - greement with the Irving - Williams order in coordination chemistry.CCDC:221750.展开更多
A new Co（Ⅲ） complex with a tripodal amide ligand [CoL（N3）3] （L = N-acetyl- N＇,N＇-bis-[（2-pyridyl）methyl]-ethylenediamine） has been synthesized and characterized structurally by X-ray diffraction. It crystal...A new Co（Ⅲ） complex with a tripodal amide ligand [CoL（N3）3] （L = N-acetyl- N＇,N＇-bis-[（2-pyridyl）methyl]-ethylenediamine） has been synthesized and characterized structurally by X-ray diffraction. It crystallizes in orthorhombic, space group Pnma with a = 9.2515（19）, b = 12.729（3）, c = 17.273（4） A, V = 2034.0（7） A3, C16H20CoN13O, Mr = 469.38, Dc = 1.533 g/cm3, μ（MoKα） = 0.884 mm^-1, F（000） = 968, Z = 4, the final R = 0.0392 and wR = 0.0818 for 2430 observed reflections. In the complex, the amide ligand L acts as a tridentate fashion and coordinates to the Co（Ⅲ） ion through three nitrogen atoms, while the other three positions of the Co（Ⅲ） center are occupied by three terminal azide anions. The complex is connected as a 1D chain structure by intermolecular hydrogen bonds between the uncoordinated amide groups. In order to investigate the coordination ability, thermodynamic stability of the ligand L with the first-series transition metal ions （Co（Ⅱ）, Ni（Ⅱ）, Cu（Ⅱ） and Zn（Ⅱ）） has been studied by potentiometric titration, and the results show that the order of their stability constants conforms to the Irving-Williams sequence.展开更多
A new binuclear Cu（Ⅱ） complex with nitronyl nitroxide radicals [Cu（NIT3Py）2Cl2]2（NIT3Py = 2-（3＇-pyridinyl）-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide） has been synthesized and structurally characterized b...A new binuclear Cu（Ⅱ） complex with nitronyl nitroxide radicals [Cu（NIT3Py）2Cl2]2（NIT3Py = 2-（3＇-pyridinyl）-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide） has been synthesized and structurally characterized by X-ray diffraction analysis.It crystallizes in monoclinic,space group C2/c with a = 38.483（4）,b = 7.2450（8）,c = 27.559（3） ,β = 134.0180（10）°,V = 5525.6（10） 3,C48H64Cl4Cu2N12O8,Mr = 1206.00,Z = 4,Dc = 1.450 g/cm3,μ（MoKα） = 1.025 mm-1,F（000） = 2504,S = 1.066,the final R = 0.0471 and wR = 0.1121 for 3286 observed reflections（I 2σ（I））.The title complex consists of centrosymmetric dinuclear units [Cu（NIT3Py）2Cl2]2,in which the copper ions are square-pyramidally coordinated by two pyridyl nitrogen atoms of two radical ligands and three chlorine anions,two of which bridge the copper ions.The magnetic measurements show ferromagnetic interactions between the copper ions and the radical ligands.展开更多
Two novel complexes {[Zn（IM4py）2（tp）（H2O）]2H2O}. 1 and {[Cd（IM4py）2（tp）- （H2O）]1.25H2O},, 2 （IM4py = 2-（4＇-pyridinyl）-4,4,5,5-tetramethylimidazoline-l-oxyl and tp = terephthalate dianion） have been sy...Two novel complexes {[Zn（IM4py）2（tp）（H2O）]2H2O}. 1 and {[Cd（IM4py）2（tp）- （H2O）]1.25H2O},, 2 （IM4py = 2-（4＇-pyridinyl）-4,4,5,5-tetramethylimidazoline-l-oxyl and tp = terephthalate dianion） have been synthesized and characterized by elemental analyses, IR spectrum and single-crystal X-ray diffraction. Crystal data for complex I： monoclinic, space group C2/c, a = 20.648（7）, b = 12.130（4）, c = 14.036（4） A, β = 106.351（5）°, C32H42N6O9Zn, Mr = 720.09, V = 3373.3（2） A3, Z= 4, Dc = 1.418 g/cm^3μt（MoKα） = 0.790 mm^-1, F（000） = 1512, the final R = 0.0407 and wR = 0.0894 for 3480 independent reflections with Rint = 0.0432. Crystal data for complex 2： monoclinic, space group C2/c, a = 21.332（6）, b = 12.063（3）, c = 14.246（4） A, β = 106.704（4）°, C32H40.50N6O8.25Cd, Mr = 753.60, V= 3511.2（2） A^3, Z = 4, Dc = 1.426 g/cm^3,μ（MoKα） = 0.679 mm^--1, F（000） = 1554, the final R = 0.0419 and wR = 0.0961 for 3627 independent reflections with Rint = 0.0440. The framework structures of complexes 1 and 2 are 3-D networks via the hydrogen bonds among 1-D chains. The notable characteristics of the two complexes are that the coordination polyhedron of Zn（Ⅱ） adopts a rare distorted five-coordinate square pyramidal geometry in 1, and the Cd（Ⅱ） complex exhibits an unusual distorted seven-coordinate pentagonal bipyramid in 2.展开更多
A new Cd（Ⅱ） complex with four nitronyl nitroxide radicals [Cd（NIT4Py）4Cl2]（NIT4Py = 2-（4＇-pyridinyl）-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide） has been synthesized and structurally characterized by X-ra...A new Cd（Ⅱ） complex with four nitronyl nitroxide radicals [Cd（NIT4Py）4Cl2]（NIT4Py = 2-（4＇-pyridinyl）-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide） has been synthesized and structurally characterized by X-ray diffraction analysis.It crystallizes in triclinic,space group P1 with a = 7.2441（4）,b = 13.6964（8）,c = 13.7354（8） ,α = 89.8610（10）,β = 77.9180（10）,γ = 87.2250（10）°,V = 1331.01（13） 3,C48H64CdCl2N12O8,Mr = 1120.41,Z = 1,Dc = 1.398 g/cm3,μ（MoKα） = 0.573 mm-1,F（000） = 582,S = 1.043,the final R = 0.0257 and wR = 0.0641 for 4333 observed reflections（I 〉2σ（I））.The title complex exists in the mononuclear-metal structures,in which each Cd（Ⅱ） ion adopts a distorted octahedral geometry and is coordinated by two Cl-anions and four pyridyl-N atoms from four NIT4Py ligands.The magnetic measurements show weak antiferromagnetic interactions between the nitroxide radicals.展开更多
Two one-dimensional cobalt（II） compounds {[Co（Hbpma）（H20）4]2·3SO4·4.5H2O}n 1 and {[Co（Hbpma）（NCS）3（H20）]·2.85H2O}n 2 （bpma = N,N＇-bis（3-pyridylmethyl）amine） have been synthesized and st...Two one-dimensional cobalt（II） compounds {[Co（Hbpma）（H20）4]2·3SO4·4.5H2O}n 1 and {[Co（Hbpma）（NCS）3（H20）]·2.85H2O}n 2 （bpma = N,N＇-bis（3-pyridylmethyl）amine） have been synthesized and structurally characterized by single-crystal X-ray diffraction. Complex 1 crystallizes in triclinic, space group Pi with a = 15.8780（5）, b = 16.2187（5）, c = 16.4858（5） A, α = 91.0420（10）,β = 94.5190（10）, γ = 101.4360（10）°, V = 4145.7（2） A3, C24H53Co2N6024.5083, Mr = 1031.76, Z = 4, Dc = 1.653 g/cm3, p（MoKa） = 1.046 mm-1, F（000） = 2148, S = 1.017, the final R = 0.0269 and wR = 0.0644 for 13032 observed reflections （I 〉 2a（/））. For complex 2, it belongs to triclinic, space group Pi with a = 9.3761（11）, b = 10.5814（13）, c = 11.2972（14）A, α= 85.472（2）,β = 88.058（2）,γ = 76.203（2）°, V= 1085.0（2） A3, C15Hzl.v0CoN603.85S3, Mr= 502.79, Z = 2, Dc = 1.539 g/cm3, p（MoKa） = 1.112 mm-1, F（000） = 519, S = 1.070, the final R = 0.0358 and wR = 0.0899 for 3466 observed reflections （I 〉 2σ（I））. Two complexes 1 and 2 are both found to be one-dimensional coordination polymers bridged by the protonated bpma ligands, which are assembled into three-dimensional supramolecular structures through the hydrogen bonding interactions and π-π packing interactions.展开更多
One novel oxamido-bridged trinuclear complex [Cu（CuL）2（ClO4）2] has been syn-thesized and structurally determined.It crystallizes in the monoclinic system,space group P21/n with a = 10.636（4）,b = 11.645（4）,c = ...One novel oxamido-bridged trinuclear complex [Cu（CuL）2（ClO4）2] has been syn-thesized and structurally determined.It crystallizes in the monoclinic system,space group P21/n with a = 10.636（4）,b = 11.645（4）,c = 16.038（6） ,β = 91.029（5）°,V = 1986.2（12） 3,C38H32Cl2Cu3N8O12,Mr = 1054.24,Dc = 1.763 Mg/m3,μ（MoKα） = 1.802 mm-1,F（000） = 1066,Z = 2,the final R = 0.0328 and wR = 0.0882 for 3152 observed reflections.The crystal structure is a trinuclear complex in which the CuII ions are bridged by macrocyclic oxamide groups.C-H···O hydrogen bonding interactions link the trinuclear fragment to form a 2D supramolecular architecture.Magnetic measurements indicate that the compound is moderately antiferromagnetically coupled.展开更多
Two cadmium（Ⅱ） compounds linked by a flexible dipyridyl ligand {[Cd2（Hbpma） Cl5（H2O）]·2H2O}n 1 and [Cd（Hbpma）Cl（H2O）2]2·2SO4·3H2O 2 （bpma = N,N-bis（3-pyridylmethyl）amine） have been synthe...Two cadmium（Ⅱ） compounds linked by a flexible dipyridyl ligand {[Cd2（Hbpma） Cl5（H2O）]·2H2O}n 1 and [Cd（Hbpma）Cl（H2O）2]2·2SO4·3H2O 2 （bpma = N,N-bis（3-pyridylmethyl）amine） have been synthesized and structurally characterized by single-crystal X-ray diffraction. Complex 1 crystallizes in triclinic, space group P with a = 9.5612（6）, b = 11.3401（7）, c = 11.5069（12）, α = 112.8540（10）, β = 106.5330（10）, γ = 101.6680（10）°, V = 1030.77（14）3, C12H20Cd2Cl5N3O3, Mr = 656.36, Z = 2, Dc = 2.115 g/cm3, μ（MoKα） = 2.727 mm–1, F（000） = 636, S = 1.059, the final R = 0.0319 and wR = 0.0822 for 3443 observed reflections （I 2σ（I））. For complex 2, it belongs to triclinic, space group P with a = 10.9487（4）, b = 11.4197（4）, c = 15.4288（5）, α = 94.7470（10）, β = 104.1000（10）, γ = 104.42°, V = 1790.76（11）3, C24H42Cd2Cl2N6O15S2, Mr = 1014.46, Z = 2, Dc = 1.881 g/cm3, μ（MoKα） = 1.529 mm–1, F（000） = 1020, S = 1.050, the final R = 0.0178 and wR = 0.0451 for 6026 observed reflections （I 2σ（I））. Complex 1 is found to have tetranuclear Cd（Ⅱ） clusters which are bridged by the protonated bpma ligands leading to one-dimensional coordination polymers, whereas complex 2 consists of binuclear Cd（Ⅱ） structures linked by the protonated bpma ligands. Both complexes are assembled into three-dimensional supramolecular structures through hydrogen bonding interactions.展开更多
文摘N,N-Bis(2-pyridylmethyl)-amine-N-ethyl-2-pyridine-2-carboxamide was synthesized and characterized according to the literature. At 25 ℃, I=0.1 mol/L KNO 3, the stability constants of the binary system formed by the ligand with metal ions in ethanol aqueous solution were studied by pH potentiometric titration and the appropriate structures with respect to the titration species were proposed. The results show that the stability order of divalent metals binding to the ligand is Co<Ni>Cu<Zn which does not conform to the order of the Irving-Williams series. Then the abnormal property of copper complex is discussed.
文摘A Zn(Ⅱ) complex with nitronyl nitroxide radicals [Zn(NIT3Py)2Cl2](1)(NIT3Py=2-(3'-pyridinyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) has been synthesized and structurally characterized by X-ray diffraction crystal structure determination method.The complex has a mononuclear-metal structure in which each Zn(Ⅱ) ion adopts a distorted tetrahedral geometry and is coordinated by two Cl-anions and two pyridyl-N atoms from two NIT3Py radical ligands.The magnetic measurements show the weak antiferromagnetic interaction between the nitroxide radicals through the diamagnetic Zn(Ⅱ) ion.CCDC:292363.
文摘A novel ligand N - ethyl - 1,10 - phenanthroline - 2 - methanamine and its Ni(Ⅱ)complex have been synthesized.The crystal structure of the complex has been determined by X - ray diffraction method.The Ni(Ⅱ)is five - coordi - nated by three nitrogen atoms from the ligand and two Cl - anions in a distorted trigonal bipyramidal environment:the N(2),Cl(1)and Cl(2)in equatorial plane;the N(1)and N(3)in axial positions.The UV - spectra and IR - spectra of the ligand and its Ni(Ⅱ)complex were recorded and discussed.The thermodynamic properties of the ligand with various bivalent metals were studied by potentiometric titrations and the order of the stability constants is in a - greement with the Irving - Williams order in coordination chemistry.CCDC:221750.
基金supported by the National Natural Science Foundation of China (No.20771083)
文摘A new Co（Ⅲ） complex with a tripodal amide ligand [CoL（N3）3] （L = N-acetyl- N＇,N＇-bis-[（2-pyridyl）methyl]-ethylenediamine） has been synthesized and characterized structurally by X-ray diffraction. It crystallizes in orthorhombic, space group Pnma with a = 9.2515（19）, b = 12.729（3）, c = 17.273（4） A, V = 2034.0（7） A3, C16H20CoN13O, Mr = 469.38, Dc = 1.533 g/cm3, μ（MoKα） = 0.884 mm^-1, F（000） = 968, Z = 4, the final R = 0.0392 and wR = 0.0818 for 2430 observed reflections. In the complex, the amide ligand L acts as a tridentate fashion and coordinates to the Co（Ⅲ） ion through three nitrogen atoms, while the other three positions of the Co（Ⅲ） center are occupied by three terminal azide anions. The complex is connected as a 1D chain structure by intermolecular hydrogen bonds between the uncoordinated amide groups. In order to investigate the coordination ability, thermodynamic stability of the ligand L with the first-series transition metal ions （Co（Ⅱ）, Ni（Ⅱ）, Cu（Ⅱ） and Zn（Ⅱ）） has been studied by potentiometric titration, and the results show that the order of their stability constants conforms to the Irving-Williams sequence.
基金supported by the National Natural Science Foundation of China (No. 20901059)the Technological Development Foundation Project of Tianjin Educational Committee (No. 20080503)
文摘A new binuclear Cu（Ⅱ） complex with nitronyl nitroxide radicals [Cu（NIT3Py）2Cl2]2（NIT3Py = 2-（3＇-pyridinyl）-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide） has been synthesized and structurally characterized by X-ray diffraction analysis.It crystallizes in monoclinic,space group C2/c with a = 38.483（4）,b = 7.2450（8）,c = 27.559（3） ,β = 134.0180（10）°,V = 5525.6（10） 3,C48H64Cl4Cu2N12O8,Mr = 1206.00,Z = 4,Dc = 1.450 g/cm3,μ（MoKα） = 1.025 mm-1,F（000） = 2504,S = 1.066,the final R = 0.0471 and wR = 0.1121 for 3286 observed reflections（I 2σ（I））.The title complex consists of centrosymmetric dinuclear units [Cu（NIT3Py）2Cl2]2,in which the copper ions are square-pyramidally coordinated by two pyridyl nitrogen atoms of two radical ligands and three chlorine anions,two of which bridge the copper ions.The magnetic measurements show ferromagnetic interactions between the copper ions and the radical ligands.
基金This work was supported by the National Natural Science Foundation of China (No. 20331010 and 20571045) Natural Science Foundation of Tianjin (No. 043602211)
文摘Two novel complexes {[Zn（IM4py）2（tp）（H2O）]2H2O}. 1 and {[Cd（IM4py）2（tp）- （H2O）]1.25H2O},, 2 （IM4py = 2-（4＇-pyridinyl）-4,4,5,5-tetramethylimidazoline-l-oxyl and tp = terephthalate dianion） have been synthesized and characterized by elemental analyses, IR spectrum and single-crystal X-ray diffraction. Crystal data for complex I： monoclinic, space group C2/c, a = 20.648（7）, b = 12.130（4）, c = 14.036（4） A, β = 106.351（5）°, C32H42N6O9Zn, Mr = 720.09, V = 3373.3（2） A3, Z= 4, Dc = 1.418 g/cm^3μt（MoKα） = 0.790 mm^-1, F（000） = 1512, the final R = 0.0407 and wR = 0.0894 for 3480 independent reflections with Rint = 0.0432. Crystal data for complex 2： monoclinic, space group C2/c, a = 21.332（6）, b = 12.063（3）, c = 14.246（4） A, β = 106.704（4）°, C32H40.50N6O8.25Cd, Mr = 753.60, V= 3511.2（2） A^3, Z = 4, Dc = 1.426 g/cm^3,μ（MoKα） = 0.679 mm^--1, F（000） = 1554, the final R = 0.0419 and wR = 0.0961 for 3627 independent reflections with Rint = 0.0440. The framework structures of complexes 1 and 2 are 3-D networks via the hydrogen bonds among 1-D chains. The notable characteristics of the two complexes are that the coordination polyhedron of Zn（Ⅱ） adopts a rare distorted five-coordinate square pyramidal geometry in 1, and the Cd（Ⅱ） complex exhibits an unusual distorted seven-coordinate pentagonal bipyramid in 2.
基金supported by the National Natural Science Foundation of China (No. 20901059 and 20771083)the Technological Development Foundation Project of Tianjin Educational Committee (No. 20080503)
文摘A new Cd（Ⅱ） complex with four nitronyl nitroxide radicals [Cd（NIT4Py）4Cl2]（NIT4Py = 2-（4＇-pyridinyl）-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide） has been synthesized and structurally characterized by X-ray diffraction analysis.It crystallizes in triclinic,space group P1 with a = 7.2441（4）,b = 13.6964（8）,c = 13.7354（8） ,α = 89.8610（10）,β = 77.9180（10）,γ = 87.2250（10）°,V = 1331.01（13） 3,C48H64CdCl2N12O8,Mr = 1120.41,Z = 1,Dc = 1.398 g/cm3,μ（MoKα） = 0.573 mm-1,F（000） = 582,S = 1.043,the final R = 0.0257 and wR = 0.0641 for 4333 observed reflections（I 〉2σ（I））.The title complex exists in the mononuclear-metal structures,in which each Cd（Ⅱ） ion adopts a distorted octahedral geometry and is coordinated by two Cl-anions and four pyridyl-N atoms from four NIT4Py ligands.The magnetic measurements show weak antiferromagnetic interactions between the nitroxide radicals.
基金supported by the National Natural Science Foundation of China(No.20901059and20771083)the Technological Development Foundation Project of Tian jin Educational Committee(No.20080503)
文摘Two one-dimensional cobalt（II） compounds {[Co（Hbpma）（H20）4]2·3SO4·4.5H2O}n 1 and {[Co（Hbpma）（NCS）3（H20）]·2.85H2O}n 2 （bpma = N,N＇-bis（3-pyridylmethyl）amine） have been synthesized and structurally characterized by single-crystal X-ray diffraction. Complex 1 crystallizes in triclinic, space group Pi with a = 15.8780（5）, b = 16.2187（5）, c = 16.4858（5） A, α = 91.0420（10）,β = 94.5190（10）, γ = 101.4360（10）°, V = 4145.7（2） A3, C24H53Co2N6024.5083, Mr = 1031.76, Z = 4, Dc = 1.653 g/cm3, p（MoKa） = 1.046 mm-1, F（000） = 2148, S = 1.017, the final R = 0.0269 and wR = 0.0644 for 13032 observed reflections （I 〉 2a（/））. For complex 2, it belongs to triclinic, space group Pi with a = 9.3761（11）, b = 10.5814（13）, c = 11.2972（14）A, α= 85.472（2）,β = 88.058（2）,γ = 76.203（2）°, V= 1085.0（2） A3, C15Hzl.v0CoN603.85S3, Mr= 502.79, Z = 2, Dc = 1.539 g/cm3, p（MoKa） = 1.112 mm-1, F（000） = 519, S = 1.070, the final R = 0.0358 and wR = 0.0899 for 3466 observed reflections （I 〉 2σ（I））. Two complexes 1 and 2 are both found to be one-dimensional coordination polymers bridged by the protonated bpma ligands, which are assembled into three-dimensional supramolecular structures through the hydrogen bonding interactions and π-π packing interactions.
基金supported by the National Natural Science Foundation of China (No.20771083 and 20901059)
文摘One novel oxamido-bridged trinuclear complex [Cu（CuL）2（ClO4）2] has been syn-thesized and structurally determined.It crystallizes in the monoclinic system,space group P21/n with a = 10.636（4）,b = 11.645（4）,c = 16.038（6） ,β = 91.029（5）°,V = 1986.2（12） 3,C38H32Cl2Cu3N8O12,Mr = 1054.24,Dc = 1.763 Mg/m3,μ（MoKα） = 1.802 mm-1,F（000） = 1066,Z = 2,the final R = 0.0328 and wR = 0.0882 for 3152 observed reflections.The crystal structure is a trinuclear complex in which the CuII ions are bridged by macrocyclic oxamide groups.C-H···O hydrogen bonding interactions link the trinuclear fragment to form a 2D supramolecular architecture.Magnetic measurements indicate that the compound is moderately antiferromagnetically coupled.
基金supported by the National Natural Science Foundation of China(No.20901059)the Technological Development Foundation Project of Tianjin Educational Committee(No.20080503)
文摘Two cadmium（Ⅱ） compounds linked by a flexible dipyridyl ligand {[Cd2（Hbpma） Cl5（H2O）]·2H2O}n 1 and [Cd（Hbpma）Cl（H2O）2]2·2SO4·3H2O 2 （bpma = N,N-bis（3-pyridylmethyl）amine） have been synthesized and structurally characterized by single-crystal X-ray diffraction. Complex 1 crystallizes in triclinic, space group P with a = 9.5612（6）, b = 11.3401（7）, c = 11.5069（12）, α = 112.8540（10）, β = 106.5330（10）, γ = 101.6680（10）°, V = 1030.77（14）3, C12H20Cd2Cl5N3O3, Mr = 656.36, Z = 2, Dc = 2.115 g/cm3, μ（MoKα） = 2.727 mm–1, F（000） = 636, S = 1.059, the final R = 0.0319 and wR = 0.0822 for 3443 observed reflections （I 2σ（I））. For complex 2, it belongs to triclinic, space group P with a = 10.9487（4）, b = 11.4197（4）, c = 15.4288（5）, α = 94.7470（10）, β = 104.1000（10）, γ = 104.42°, V = 1790.76（11）3, C24H42Cd2Cl2N6O15S2, Mr = 1014.46, Z = 2, Dc = 1.881 g/cm3, μ（MoKα） = 1.529 mm–1, F（000） = 1020, S = 1.050, the final R = 0.0178 and wR = 0.0451 for 6026 observed reflections （I 2σ（I））. Complex 1 is found to have tetranuclear Cd（Ⅱ） clusters which are bridged by the protonated bpma ligands leading to one-dimensional coordination polymers, whereas complex 2 consists of binuclear Cd（Ⅱ） structures linked by the protonated bpma ligands. Both complexes are assembled into three-dimensional supramolecular structures through hydrogen bonding interactions.
