A new complex bis[(N-salicylidene-N’-ami noethanol)abstract:dioxovandium (Ⅴ)abstract:,[V (Ⅴ)abstract:(Ⅴ)abstract:(SALAE)abstract:]2 ,was synthesized by the reaction of salicylaldehyde and aminoethanol with va nady...A new complex bis[(N-salicylidene-N’-ami noethanol)abstract:dioxovandium (Ⅴ)abstract:,[V (Ⅴ)abstract:(Ⅴ)abstract:(SALAE)abstract:]2 ,was synthesized by the reaction of salicylaldehyde and aminoethanol with va nadyl sulfate.It was characterized by elemental analysis,IR and X-ray single cr ystal diffraction analysis.The crystal of the title complex(C 18 H 20 N 2 O 8 V 2 ,M r =494.24)abstract:be-longs to monoclinic,space group P2 1 /c with the following crystallographic parameters:a=1.7966(6)abstract:nm,b=0.7587(3)abstract:n m,c=2.1539(7)abstract:nm,β =92.551(6)abstract:°,V=2.9329(17)abstract:nm 3 ,Z=6,D c =1.679g · cm -3 ,μ (MoK α )abstract:=1.006mm -1 ,F(000)abstract:=1512,and final R 1 =0.0563,wR 2 =0.1243for observed reflections2861(I>2 σ (I)abstract:)abstract:.The complex is a bis( μ -oxo)abstract:-bridged V schiff base dimer formed by two dioxovandium units,V is six-coordinated and forms a distorted octahedral structure.The thermal d ecomposition for the complex was studied by TG-DTG curves and the apparent acti vation energy was obtained by the Kissinger formula.CCDC:211147.展开更多
The title complex, potassium triethylenetetraaminehexaacetatodi [oxo-vanadium (Ⅳ)] hexahydrate K2[V2O2(ttha)]6(H2O), was synthesized in aqueous solution and its crystal structure has been determined by X-ray diffract...The title complex, potassium triethylenetetraaminehexaacetatodi [oxo-vanadium (Ⅳ)] hexahydrate K2[V2O2(ttha)]6(H2O), was synthesized in aqueous solution and its crystal structure has been determined by X-ray diffraction. The complex belongs to a triclinic system, space group P?with a = 6.645(1), b = 9.870(2), c = 13.263(3) ? a = 70.68(3), b = 76.27(3), g = 71.66(3), V = 770.5(3) 3, Mr = 808.58, Dc = 1.743 g/cm3, Z = 1, m = 0.968 mm-1, l(MoKa) = 0.71073 and F(000) = 416. The final R = 0.0465 and wR = 0.1091 for 2974 observed diffractions with I ≥ 2s(I). In the complex, the V atom is octahedrally coordinated to the oxo ligand, two N and three O atoms of the triethylenetetraaminehexaacetic (TTHA) ligand. All of the ten chelating sites are coordinated to the two vanadium atoms, and the coordination octahedron is distorted. Each [V2O2(ttha)]2- ion is further connected by the K+ ions through carboxyl groups of TTHA6- ion, forming a two dimensional network structure.展开更多
文摘A new complex bis[(N-salicylidene-N’-ami noethanol)abstract:dioxovandium (Ⅴ)abstract:,[V (Ⅴ)abstract:(Ⅴ)abstract:(SALAE)abstract:]2 ,was synthesized by the reaction of salicylaldehyde and aminoethanol with va nadyl sulfate.It was characterized by elemental analysis,IR and X-ray single cr ystal diffraction analysis.The crystal of the title complex(C 18 H 20 N 2 O 8 V 2 ,M r =494.24)abstract:be-longs to monoclinic,space group P2 1 /c with the following crystallographic parameters:a=1.7966(6)abstract:nm,b=0.7587(3)abstract:n m,c=2.1539(7)abstract:nm,β =92.551(6)abstract:°,V=2.9329(17)abstract:nm 3 ,Z=6,D c =1.679g · cm -3 ,μ (MoK α )abstract:=1.006mm -1 ,F(000)abstract:=1512,and final R 1 =0.0563,wR 2 =0.1243for observed reflections2861(I>2 σ (I)abstract:)abstract:.The complex is a bis( μ -oxo)abstract:-bridged V schiff base dimer formed by two dioxovandium units,V is six-coordinated and forms a distorted octahedral structure.The thermal d ecomposition for the complex was studied by TG-DTG curves and the apparent acti vation energy was obtained by the Kissinger formula.CCDC:211147.
基金the National Natural Science Foundation of China (20173046)
文摘The title complex, potassium triethylenetetraaminehexaacetatodi [oxo-vanadium (Ⅳ)] hexahydrate K2[V2O2(ttha)]6(H2O), was synthesized in aqueous solution and its crystal structure has been determined by X-ray diffraction. The complex belongs to a triclinic system, space group P?with a = 6.645(1), b = 9.870(2), c = 13.263(3) ? a = 70.68(3), b = 76.27(3), g = 71.66(3), V = 770.5(3) 3, Mr = 808.58, Dc = 1.743 g/cm3, Z = 1, m = 0.968 mm-1, l(MoKa) = 0.71073 and F(000) = 416. The final R = 0.0465 and wR = 0.1091 for 2974 observed diffractions with I ≥ 2s(I). In the complex, the V atom is octahedrally coordinated to the oxo ligand, two N and three O atoms of the triethylenetetraaminehexaacetic (TTHA) ligand. All of the ten chelating sites are coordinated to the two vanadium atoms, and the coordination octahedron is distorted. Each [V2O2(ttha)]2- ion is further connected by the K+ ions through carboxyl groups of TTHA6- ion, forming a two dimensional network structure.
