Yb 3+ complexes with two nitrilotriacetic acid molecules were prepared and their compositions were determined as K 3[Yb(nta) 2(H 2O)]·5H 2O and Na 3[Yb(nta) 2]·6H 2O by elemental analyses. Their structures w...Yb 3+ complexes with two nitrilotriacetic acid molecules were prepared and their compositions were determined as K 3[Yb(nta) 2(H 2O)]·5H 2O and Na 3[Yb(nta) 2]·6H 2O by elemental analyses. Their structures were characterized by single crystal X ray diffraction analyses. In complex K 3[Yb(nta) 2(H 2O)]·5H 2O, the YbN 2O 7 part forms a nine coordinate monocapped square antiprismatic structure. In complex Na 3[Yb(nta) 2]·6H 2O, the YbN 2O 6 part forms an eight coordinate square antiprismatic structure. It can be seen that the outer cations (K + and Na +) greatly affect the coordination number and coordinate structure from these results.展开更多
Compound Na3 [V2O3 (nta )2 ]·5H2O (1) (ntaH3 = N (CH2CO2H)3) has been prepared by reduction of a mixture of (NH4)2[VO(O2)2Cl] and H3(nta) in H2O with Na2S2O4. The compound crystallizes in the triclinic system, sp...Compound Na3 [V2O3 (nta )2 ]·5H2O (1) (ntaH3 = N (CH2CO2H)3) has been prepared by reduction of a mixture of (NH4)2[VO(O2)2Cl] and H3(nta) in H2O with Na2S2O4. The compound crystallizes in the triclinic system, space group P1 with Mr = 685. 2, a = 11. 050(6), b=12. 179(4), c=9. 792 (3)A,α=111.71(2),β= 98. 23(3), γ= 89. 36(2)°, Z=2, V = 1210. 5A3,λ(MoKa) = 0. 71069 A, F(000) = 694 and DC = 1. 880g/cm3. The structure was solved by direct methods and refined by full-matrix least squares to final R and Rw values of 0. 055 and 0. 065, respectively.The structure of the anion can be considered as two [VO(nta)] fragments connected by one μ2-O atom. Each vanadium atom in the fragment is coordinated by one vanadyl oxygen atom, one bridging-oxygen atom, three oxygen atoms and one nitrogen atom from (nta) ligand in a distorted octahedral geometry. In this paper, we have studied the conversion of compound 1 to mononuclear compound Na2[VO(O2) (nta)]·5H2O (2) by oxidation with hydrogen peroxide, as well as展开更多
The title complex ([SmN(CH 2COO) 3(H 2O) 2]·H 2O, M r =392.52) has been prepared from Sm(ClO 4) 3 and NH 2(CH 2COO) 3Na in aqueous solution. The crystal structure of the complex was determined by X ray diffractio...The title complex ([SmN(CH 2COO) 3(H 2O) 2]·H 2O, M r =392.52) has been prepared from Sm(ClO 4) 3 and NH 2(CH 2COO) 3Na in aqueous solution. The crystal structure of the complex was determined by X ray diffraction method. The crystal belongs to the orthorhombic system with space group Pbca, a=8.110(1), b=13\^120(2), c=20.788(2) , V=2211.9(5) 3, Z=8, F(000)=1512, μ =5\^349 mm -1 , R =0.0182 and wR =0.0385 for 1909 observed reflections with I>2σ(I) . The Sm 3+ is nine coordinated and the coordination polyhedron is a distorted, tricapped trigonal prism. The whole structure can be characterized as a two dimensional network.展开更多
The title complex crystallizes in the hexagonal space group P65 (No. 170) with a = 9. 020(1), c=48. 969(6) A , V = 3450. 3(9)A3, Z = 6, Dc= 3. 14 gcm-3 and μ(MoKa) = 21. 99 mm-1. The crystal structure (R = 0. 063 for...The title complex crystallizes in the hexagonal space group P65 (No. 170) with a = 9. 020(1), c=48. 969(6) A , V = 3450. 3(9)A3, Z = 6, Dc= 3. 14 gcm-3 and μ(MoKa) = 21. 99 mm-1. The crystal structure (R = 0. 063 for 2173 observed data) consists of a three-dimehsional network featuring three independent lead(Ⅱ) atoms in 7-, 8-, and 9-coordination environments. The bond lengths of Pb-N are 2. 62(3) and 2. 63(3) A, and those of Pb-O range from 2. 49(4) to 3. 00(3) A.展开更多
A novel Co(II)-Na(I) heterometallic coordination polymer {[CoNa(NTA)(H 2O) 3]·2H 2O} n (NTA=nitrilotriacetate) was synthesized and characterized by elemental analysis and X-ray diffraction study. The electrochemi...A novel Co(II)-Na(I) heterometallic coordination polymer {[CoNa(NTA)(H 2O) 3]·2H 2O} n (NTA=nitrilotriacetate) was synthesized and characterized by elemental analysis and X-ray diffraction study. The electrochemical behavior in aqueous solution was measured by cyclic voltammetry, indicating a quasi-reversible process. The complex crystallizes in the orthorhombic space group Pbca with the cell parameters a=1.47276(3) nm, b=0.97280(3) nm, c=1.92946(6) nm, V=2.76434(13) nm 3, Z=8. In the title complex, there are two kinds of zigzag chains which interconnect together to form 2D network. One stretches along the b-axis, comprising Co(II) ions, the other stretches along the c-axis, comprising Na(I) ions.展开更多
The copper(II) complex [Cu 3(nta) 2(azpy) 2(H 2O) 2]·6H 2O (nta=nitrilotriacetate, azpy=4,4′ azobispyridine) has been synthesized and characterized. The X ray analysis reveals that there are two kinds of copper(...The copper(II) complex [Cu 3(nta) 2(azpy) 2(H 2O) 2]·6H 2O (nta=nitrilotriacetate, azpy=4,4′ azobispyridine) has been synthesized and characterized. The X ray analysis reveals that there are two kinds of copper(II) coordination environments. Cu(1) has a distorted square plane symmetry and Cu(2) has a distorted octahedral symmetry. Cu(1) is linked to Cu(2) through nta and bound to Cu(1C) by azpy, and Cu(2) is linked to Cu(2A) through azpy, which extends to two dimensional network with large rhombus 1 2 nm×1 7 nm.展开更多
基金Supported by the Natural Science Fund of L iaoning Province and Shenyang City Science and Technology Comm ittee
文摘Yb 3+ complexes with two nitrilotriacetic acid molecules were prepared and their compositions were determined as K 3[Yb(nta) 2(H 2O)]·5H 2O and Na 3[Yb(nta) 2]·6H 2O by elemental analyses. Their structures were characterized by single crystal X ray diffraction analyses. In complex K 3[Yb(nta) 2(H 2O)]·5H 2O, the YbN 2O 7 part forms a nine coordinate monocapped square antiprismatic structure. In complex Na 3[Yb(nta) 2]·6H 2O, the YbN 2O 6 part forms an eight coordinate square antiprismatic structure. It can be seen that the outer cations (K + and Na +) greatly affect the coordination number and coordinate structure from these results.
文摘Compound Na3 [V2O3 (nta )2 ]·5H2O (1) (ntaH3 = N (CH2CO2H)3) has been prepared by reduction of a mixture of (NH4)2[VO(O2)2Cl] and H3(nta) in H2O with Na2S2O4. The compound crystallizes in the triclinic system, space group P1 with Mr = 685. 2, a = 11. 050(6), b=12. 179(4), c=9. 792 (3)A,α=111.71(2),β= 98. 23(3), γ= 89. 36(2)°, Z=2, V = 1210. 5A3,λ(MoKa) = 0. 71069 A, F(000) = 694 and DC = 1. 880g/cm3. The structure was solved by direct methods and refined by full-matrix least squares to final R and Rw values of 0. 055 and 0. 065, respectively.The structure of the anion can be considered as two [VO(nta)] fragments connected by one μ2-O atom. Each vanadium atom in the fragment is coordinated by one vanadyl oxygen atom, one bridging-oxygen atom, three oxygen atoms and one nitrogen atom from (nta) ligand in a distorted octahedral geometry. In this paper, we have studied the conversion of compound 1 to mononuclear compound Na2[VO(O2) (nta)]·5H2O (2) by oxidation with hydrogen peroxide, as well as
文摘The title complex ([SmN(CH 2COO) 3(H 2O) 2]·H 2O, M r =392.52) has been prepared from Sm(ClO 4) 3 and NH 2(CH 2COO) 3Na in aqueous solution. The crystal structure of the complex was determined by X ray diffraction method. The crystal belongs to the orthorhombic system with space group Pbca, a=8.110(1), b=13\^120(2), c=20.788(2) , V=2211.9(5) 3, Z=8, F(000)=1512, μ =5\^349 mm -1 , R =0.0182 and wR =0.0385 for 1909 observed reflections with I>2σ(I) . The Sm 3+ is nine coordinated and the coordination polyhedron is a distorted, tricapped trigonal prism. The whole structure can be characterized as a two dimensional network.
文摘The title complex crystallizes in the hexagonal space group P65 (No. 170) with a = 9. 020(1), c=48. 969(6) A , V = 3450. 3(9)A3, Z = 6, Dc= 3. 14 gcm-3 and μ(MoKa) = 21. 99 mm-1. The crystal structure (R = 0. 063 for 2173 observed data) consists of a three-dimehsional network featuring three independent lead(Ⅱ) atoms in 7-, 8-, and 9-coordination environments. The bond lengths of Pb-N are 2. 62(3) and 2. 63(3) A, and those of Pb-O range from 2. 49(4) to 3. 00(3) A.
基金ProjectsupportedbytheEducationCommissionofZhejiangProvince (No .2 0 0 10 12 9)and"5 5 1"DistinguishedPersonFoundationofWenzhou
文摘A novel Co(II)-Na(I) heterometallic coordination polymer {[CoNa(NTA)(H 2O) 3]·2H 2O} n (NTA=nitrilotriacetate) was synthesized and characterized by elemental analysis and X-ray diffraction study. The electrochemical behavior in aqueous solution was measured by cyclic voltammetry, indicating a quasi-reversible process. The complex crystallizes in the orthorhombic space group Pbca with the cell parameters a=1.47276(3) nm, b=0.97280(3) nm, c=1.92946(6) nm, V=2.76434(13) nm 3, Z=8. In the title complex, there are two kinds of zigzag chains which interconnect together to form 2D network. One stretches along the b-axis, comprising Co(II) ions, the other stretches along the c-axis, comprising Na(I) ions.
文摘The copper(II) complex [Cu 3(nta) 2(azpy) 2(H 2O) 2]·6H 2O (nta=nitrilotriacetate, azpy=4,4′ azobispyridine) has been synthesized and characterized. The X ray analysis reveals that there are two kinds of copper(II) coordination environments. Cu(1) has a distorted square plane symmetry and Cu(2) has a distorted octahedral symmetry. Cu(1) is linked to Cu(2) through nta and bound to Cu(1C) by azpy, and Cu(2) is linked to Cu(2A) through azpy, which extends to two dimensional network with large rhombus 1 2 nm×1 7 nm.
