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The μ-oxygen-bis[tri(p-fluorobenzyl)tin] was synthesized. The structure were characterized by elementary analysis, IR and 1H NMR and the crystal structure were determined by X-ray single crystal diffraction. The crystal of the title compound belongs to rhombohedral with space group R, a=1.346 4(4), b=1.346 4(4), c=1.772 9(7) nm, α=90°, β=90°, γ=120°, Z=3, V=2.783 2(15) nm3, Dc=1.625 g·cm-3, μ(Mo Kα)=1.408 mm-1, S=1.088, F(000)=1 350, R1=0.027 5, wR2=0.065 9. In compound, the tin atom has a distorted tetrahedral coordination configuration. CCDC: 257079. 相似文献
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微量元素硒及有机硒药物研究进展 总被引:11,自引:1,他引:11
从硒的营养学、硒的免疫学、硒的肿瘤学三个方面概括了微量元素硒的研究进展。研究表明,一些含硒有机化合物具有抗氧化性、抗炎、防癌、抗癌等药用前景。 相似文献
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本文研究了在单位圆内的解析函数类M_n(α,β).利用解析函数的性质和不等式技巧进行讨论,得到了这类函数的包含关系、系数估计等性质以及这类函数的一个充分条件. 相似文献
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A novel complex, chlorodi(p-chlorbenzyl)tin dithiotetrahydropyrrolocarbamate, has been synthesized. The crystal structure has been determined by X-ray single crystal diffraction. The crystal of the complex belongs to monoclinic with space group C2/c, a=3.070 0(19) nm, b=0.787 9(5) nm, c=2.374 9(15) nm, β=119.63(9) °, Z=8, V=4.993(5) nm3, Dc=1.515 g·cm-3, μ=1.521 mm-1, R1=0.047 4, wR2=0.097 2. The structure of the complex consists of discrete molecule containing five-coordinate tin atom in a seriously distorted trigonal bipyramidal configuration. The molecules are packed in the unit cell in one-dimensional chain polymer through a weak interaction between the chlorine atoms of the adjacent molecules. CCDC: 220743. 相似文献
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丙酮酸异烟酰腙合锡(IV)配合物[Ph2Sn(C9H7N3O3)-(H2O)]2的合成、性质和晶体结构 总被引:1,自引:1,他引:0
以丙酮酸异烟酰腙作为配体与二苯基氧化锡反应,制得新配合物[Ph2Sn(C9H7N3O3)(H2O)]2。通过元素分析、红外光谱和核磁共振氢谱测试技术对其结构进行了表征,用X射线单晶衍射测定了化合物的晶体结构。该化合物晶体属正交晶系,空间群为P212121,晶胞参数a=1.1420(3)nm,b=1.1713(8)nm,c=3.520(2)nm,V=4.709(5)nm^3,Z=4,μ=1.125mm^-1,Dc=1.501Mg/m^3,F(000)=2144,R=0.0745,wR=0.1704,GOF=1.015。测试结果表明,在配合物中锡原子处于七配位的五角双锥配位环境,配位原子分别来自1个三齿配体丙酮酸异烟酰腙负二价离子的2个O原子和1个N原子,1个水分子中的O原子,邻位配体中的1个O原子,以及来自于2个苯基的2个C原子,其中2个C原子占据了五角双锥的轴向位置。生物活性测试结果表明,化合物对MCF-7和WiDr均表现出较好的抑制作用。 相似文献
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柴胡逆转肝细胞癌多药耐药作用与相关机制的研究 总被引:8,自引:0,他引:8
选用对VCR天然耐药肝癌细胞株Bel-7402为对象来研究柴胡逆转MDR效果与相关的机制,以寻找一种新型的具有多药耐药逆转活性的中药.结果表明,柴胡具有逆转肝细胞癌多药耐药作用,并与抗癌药物VCR有协同作用.柴胡对人肝癌Bel-7402细胞株具有多药耐药逆转作用,提高了耐药细胞内的VCR含量,增加了VCR对细胞G2期阻滞作用,抑制了P-170糖蛋白的表达,抑制MDR1/mRNA的表达,提高了TopoαmRNA水平. 相似文献
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Di(o-fluorbenzyl)tin bis(dithiotetrahydropyrrolcarbamate) (1) and di(p-chlorbenzyl)tin bis(dithiomethylcarbamate) (2) were synthesized. Their structure were characterized by elementary analysis, IR and 1H NMR and the crystal structure were determined by X-ray single crystal diffraction. The crystal of complex 1 belongs to orthorhombic with space group Pccn, a=2.096 1(12) nm, b=1.018 5(6) nm, c=1.205 9(7) nm, Z=4, V=2.574(2) nm3, Dc=1.624 g·cm-3, μ(MoKα)=1.348 mm-1, F(000)=1 272,R1=0.038 7, wR2=0.088 5. The crystal of complex 2 belongs to monoclinic with space group C2/c, a=1.531 3(16), b=1.868 4(19), c=0.951 8(10) nm, β=112.602(14)°, Z=4, V=2.514(5) nm3, Dc=1.612 g·cm-3, μ(MoKα)=1.572 mm-1, R1=0.025 4, wR2=0.070 4. In the complexes 1 and 2, the structures consist of discrete molecules containing six-coordinate tin atom in a distorted octahedron configuration. In crystal of complex 1, molecules are packed in the unit cell in one-dimensional chain structure through a S…S interaction between adjacent molecule. CCDC: 225420, 1; 225421, 2. 相似文献