Two Co ?complexes Co (β-diketonate) 2(py) 2Co (bzac)2 (py) 2(1)andCo (tta) 2 (py) 2(2)(bzacH =benzoylacetone,ttaH =2-thenoyltr ifluoroacetone,py =pyridine)were synthesized and characterized by X-ray diffraction.Compl...Two Co ?complexes Co (β-diketonate) 2(py) 2Co (bzac)2 (py) 2(1)andCo (tta) 2 (py) 2(2)(bzacH =benzoylacetone,ttaH =2-thenoyltr ifluoroacetone,py =pyridine)were synthesized and characterized by X-ray diffraction.Complex1crystallizes in monoclinic system,space group P2 1 /n with a=0.7409(2),b=1.7430(4),c=1.0527(2)nm,β=102.23(3)°,V=1.3285(5)nm 3 ,Z =2,F(000)=562,D c =1.349g·cm -3 ,μ(Mo Kα)=0.684mm -1 .The structure was refined to R=0.0307and w R=0.0827for observed 2437reflectio ns with I≥2σ(I).Complex2crystallizes in triclinic system,s pace groupP1with a=0.9634(2),b=0.9678(2),c=0.9713(2)nm,α=111.18(3),β=114.61(3),γ=99.05(3)°,V=0.7154(2)nm 3 ,Z =1,F(000)=333,D c =1.531g·cm -3 ,μ(Mo Kα)=0.819mm -1 .The structure was refined to R=0.0595and w R=0.1769for observed 2708reflection s with I≥2σ(I).In both structures the Co ?ions are six-coordinated to form distorted octahedron.展开更多
Four titanocene complexes were prepared in aqueous or two - phase medium by the reaction of benzoylacetone titanocene with substituted salicylic acid,respectively.Based on the UV - Vis spectra,we studied the accelerat...Four titanocene complexes were prepared in aqueous or two - phase medium by the reaction of benzoylacetone titanocene with substituted salicylic acid,respectively.Based on the UV - Vis spectra,we studied the accelerating effect of the benzoylacetone on the reaction rate quantificationally.The results demonstrated that the presence of it not only stabilizes the “ Cp 2 Ti ” species and accordingly makes pH value of the aqueous solution of substituted salicylic acid increased but also prompts the reaction due to the presence of its conjugation structure and oleophyllic group.Furthermore,the presence of benzoylacetone is in favor of the simplification of the products.展开更多
文摘Two Co ?complexes Co (β-diketonate) 2(py) 2Co (bzac)2 (py) 2(1)andCo (tta) 2 (py) 2(2)(bzacH =benzoylacetone,ttaH =2-thenoyltr ifluoroacetone,py =pyridine)were synthesized and characterized by X-ray diffraction.Complex1crystallizes in monoclinic system,space group P2 1 /n with a=0.7409(2),b=1.7430(4),c=1.0527(2)nm,β=102.23(3)°,V=1.3285(5)nm 3 ,Z =2,F(000)=562,D c =1.349g·cm -3 ,μ(Mo Kα)=0.684mm -1 .The structure was refined to R=0.0307and w R=0.0827for observed 2437reflectio ns with I≥2σ(I).Complex2crystallizes in triclinic system,s pace groupP1with a=0.9634(2),b=0.9678(2),c=0.9713(2)nm,α=111.18(3),β=114.61(3),γ=99.05(3)°,V=0.7154(2)nm 3 ,Z =1,F(000)=333,D c =1.531g·cm -3 ,μ(Mo Kα)=0.819mm -1 .The structure was refined to R=0.0595and w R=0.1769for observed 2708reflection s with I≥2σ(I).In both structures the Co ?ions are six-coordinated to form distorted octahedron.
文摘Four titanocene complexes were prepared in aqueous or two - phase medium by the reaction of benzoylacetone titanocene with substituted salicylic acid,respectively.Based on the UV - Vis spectra,we studied the accelerating effect of the benzoylacetone on the reaction rate quantificationally.The results demonstrated that the presence of it not only stabilizes the “ Cp 2 Ti ” species and accordingly makes pH value of the aqueous solution of substituted salicylic acid increased but also prompts the reaction due to the presence of its conjugation structure and oleophyllic group.Furthermore,the presence of benzoylacetone is in favor of the simplification of the products.
