A new trithiocarbonato Mo complex(Et_4N)_2[(S_2)Mo2O_2(μ-S)_2(CS_3)]was obtained from a system containing MoO_4^(2-),S_x^(2-),and CS_2 and characterized by IR and X-ray structural analysis. The complex crystallizes i...A new trithiocarbonato Mo complex(Et_4N)_2[(S_2)Mo2O_2(μ-S)_2(CS_3)]was obtained from a system containing MoO_4^(2-),S_x^(2-),and CS_2 and characterized by IR and X-ray structural analysis. The complex crystallizes in the (?)onoclinic space group P2_1/c with a=9.539(3)(?), b=20.745(2)(?),c=15.452(2)(?),β=94.58(2)°,and Z=4.The structure was solved by direct and difference Fourier synthesis methods.Least squares refinement using 2910 reflections with I>3σ(I)converged to R=0.054.The CS_3^(2-) iigand in the complex chelates to Mo atom and values of the C-S bond distances in the CS_3^(2-) ligend indicate a substantial contribution of three resonance forms.展开更多
One new Iriterpene saponin was isolated from Panaxjaponicus C. A. Meyer var major （Burk.） C. Y. Wu et K. M. Feng, and established as oleanolic acid 3-O-[β-D-glucopyranosyl-（1 →2）-β-D-glucuronopyranosyl-6＇-O-n-...One new Iriterpene saponin was isolated from Panaxjaponicus C. A. Meyer var major （Burk.） C. Y. Wu et K. M. Feng, and established as oleanolic acid 3-O-[β-D-glucopyranosyl-（1 →2）-β-D-glucuronopyranosyl-6＇-O-n-butyl ester] which showed mod- erate antitumor activities against the A2780 cells and OVCAR-3 cells. Its structure was established by means of spectral data, particularly NMR, including HSQC and HMBC techniques.展开更多
The title compound was prepared by dissolving 1.3g MoCl3·3H2O into 20 ml anhydrous formic acid. The solution was then heated and refluxed for half an hour. After cooling a bit, 20ml anhydrous ethanol saturated wi...The title compound was prepared by dissolving 1.3g MoCl3·3H2O into 20 ml anhydrous formic acid. The solution was then heated and refluxed for half an hour. After cooling a bit, 20ml anhydrous ethanol saturated with HCl and 0.5g （Et4N）I were added to the solution. The brown twin crystals were crystallized in three days. The formula of the product was confirmed by elemental chemical analysis. Found: Mo, 36.09; Cl, 26.84; C, 15.19; H, 3.54; N, 1.76. Calcd: Mo, 36.82; Cl, 27.21; C, 16.90; H, 2.97; N, 1.79. Diffraction work of a selected twin展开更多
文摘A new trithiocarbonato Mo complex(Et_4N)_2[(S_2)Mo2O_2(μ-S)_2(CS_3)]was obtained from a system containing MoO_4^(2-),S_x^(2-),and CS_2 and characterized by IR and X-ray structural analysis. The complex crystallizes in the (?)onoclinic space group P2_1/c with a=9.539(3)(?), b=20.745(2)(?),c=15.452(2)(?),β=94.58(2)°,and Z=4.The structure was solved by direct and difference Fourier synthesis methods.Least squares refinement using 2910 reflections with I>3σ(I)converged to R=0.054.The CS_3^(2-) iigand in the complex chelates to Mo atom and values of the C-S bond distances in the CS_3^(2-) ligend indicate a substantial contribution of three resonance forms.
基金financially supported by Chinese Academy of Nutritional Sciences,Shanghai Institutes for Biological Sciences
文摘One new Iriterpene saponin was isolated from Panaxjaponicus C. A. Meyer var major （Burk.） C. Y. Wu et K. M. Feng, and established as oleanolic acid 3-O-[β-D-glucopyranosyl-（1 →2）-β-D-glucuronopyranosyl-6＇-O-n-butyl ester] which showed mod- erate antitumor activities against the A2780 cells and OVCAR-3 cells. Its structure was established by means of spectral data, particularly NMR, including HSQC and HMBC techniques.
文摘The title compound was prepared by dissolving 1.3g MoCl3·3H2O into 20 ml anhydrous formic acid. The solution was then heated and refluxed for half an hour. After cooling a bit, 20ml anhydrous ethanol saturated with HCl and 0.5g （Et4N）I were added to the solution. The brown twin crystals were crystallized in three days. The formula of the product was confirmed by elemental chemical analysis. Found: Mo, 36.09; Cl, 26.84; C, 15.19; H, 3.54; N, 1.76. Calcd: Mo, 36.82; Cl, 27.21; C, 16.90; H, 2.97; N, 1.79. Diffraction work of a selected twin
