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使用质子核磁共振方法测定了新的抗癌活性配合物cis-[Pt(NH3)2(4-mepy)Cl]+与甲基-谷胱甘肽(GS-Me)的反应及其动力学.结果表明Pt与GS-Me间形成1:1加合物.为了解结合部位,对Pt-GS-Me配合物进行pH滴定,由GS-Me的质子核磁共振谱对pH的依赖关系判断Gs-Me只通过S原子与Pt配位,而氨基和羧基不参与配位反应.由配体吡啶环质子核磁共振随时间的变化,提出了两步反应机制:首先GS-Me通过S原子与Pt配位,然后由于S配位的高度反位效应使反应的NH3活动化.通过1HNMR方法测定了第一步反应的速率常数k=0.017L·mol-1·s-1(pH3.1)和k=0.013L·mol-1·s-1(pH7.2). 相似文献
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CRYSTAL STRUCTURE OF(Bu4N)2[Pt(C3S5)2] 总被引:1,自引:0,他引:1
<正> The title compound C38H72N2PtS10(Mr=1072.74)crystallizes in triclinic system,space group P1 with cell constants a=11.994(4),b=18.117(7),c=11.855(6)A,α=95.55(4),β=99.14(3),γ=75.71(3)°,V=2460.0A3,Z=2 and Dc=1.45 gcm-3.The structure is solved by direct methods and refined by full-matrix least-squares technique to final R=0.046 and Rw=0.045 based on 5919 independent reflections with I≥3.0(I).The anion [Pt(C3S5)2]2-is approximately planar,of which the platinum-sulfur coordination polyhedron takes a square form with mean Pt-S bond length of 2.310(4)A. 相似文献
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(η^2—C60)[Pt(PPh3)2]8的合成与表征 总被引:6,自引:2,他引:6
C60是高度共轭的宠状结构碳素体.分子结构中六元环间的共价碳碳双键是富电子区,其反应性能与烯键类似,以碳碳双键与中心金属形成η2配位化合物.富勒烯η2配合物的合成及性能研究是当前研究热点之一[1~7].本文在(η2-C60)[Pt(PPh3)2]n(n=1~6)系列研究[7]的基础上制备了(η2-C60)[Pt(PPh3)2]8,并用元素分析、红外光谱和光电子能谱进行鉴定和表征.1实验部分四(三苯基膦)合铂Pt(PPh3)4按文献[8]方法制备;C60纯度为99%;其余试剂均为分析纯.元素分析在ERLA-1106型元素分析仪上进行;光电子能谱在VGESCA… 相似文献
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CrystalStructureof[Cd(pom)_2Cl_2]WuWen-Shi(DepartmentofChemistry,Hua-qiaoUniversity,Fujian,China,362011)DongMei-Bin;LiSong-Xia... 相似文献
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稀土氨基酸配合物的研究(Ⅲ):(Pr2Cl2(Gly)4(H2O)6).4Cl配合物的 … 总被引:11,自引:2,他引:11
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测定了三核苯甲苯酸合物[Fe3O(OBz)6(CH3OH)3](NO3)(CH3OH)2(OBz^-=苯甲酸根)的电子光谱,应用配体场理论和T-S图求得配体场参数10Dq-12457cm^-1,用CNDO/2方法对其简化模型进行了计算。 相似文献
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本文合成了三个新的双膦螯合配体和一系列新的cis-Pt(diphos)X_2(diphos=R_2PCH_2CH_2PR_2,R=Et,n-Pr,n-Bu,i-Bu;X=Cl~-,Br~-,I~-,CN~-,SCN~-,NO_2~-)配合物,经过IR、~(31)PNMR和元素分析表征了它们的结构,并观察到~(31)P化学位移δp、铂-磷偶合常数J(p1-p)与配体X的反位效应和双膦配体的σ-供电性质有关。此外,根据谱学研究,发现SCN~-和NO_2~-配体存在键合异构现象,并对谱带进行了归属。 相似文献
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Inrecentyearssynthesisandcharacterizationofnewmetallaboranesandmetallacarboraneshaveattractedmuchinterest .1 3Awidevarietyofclustercomplexes ,inwhichcoordinationcanbeviaB—H—Mor (and)Bn—Mbond(n =1,2 ,3,4 ,5 ,6 ) ,havebeensynthesizedandstructurallycharacterized .Thepo… 相似文献
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2—二甲胺基—6羟基—4—甲基嘧啶与铜(Ⅱ),锌(Ⅱ)配合物的研究 总被引:9,自引:1,他引:9
本文合成了2-二甲胺基6-羟基-4-基嘧啶与铜(Ⅱ),锌(Ⅱ)的配合物,并用元素分析,红外,紫外光谱,差热-热重和摩尔电导等方法对产的性质进行了表征。 相似文献
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The title compound tetraethylammonium hexacarbonylbis(μ-pyridine-2-thiolato-S∶S) dimolybdenum [Et4N]2[Mo2(CO)6(pys)2] crystallizes in the monoclinic, space group, P21/c with a=13.217(2), b=21.648(2), c=27.193(6)(), β=82.52(2)°, V=7714.6()3, Z=8, Mr=840.77, Dc=1.45 g/cm3, μ=7.8 cm-1, R=0.038 and Rw=0.040 for 6082 reflections with I≥3σ(I). X-ray crystal structure study reveals that the asymmetric unit of the title compound is comprised of two independent formulations of the molecular formula. Each dianion has approximate C2 symmetry and the dimetallic Mo2S2 core adopts a "butterfly" conformation with a dihedral angle between the halves of 139.3(1)° for the first independent anion and 142.8(1)° for the second one. The two pyridine rings lie on the same side of the molecule in a cis arrangement and the Mo...Mo separations are 3.76(1) and 3.838(1)(). 相似文献
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1 INTRODUCTION A number of Pt complexes with monosulfoxide have been isolated and characterized[1]. It was indicated that the sulfoxide group trends to coordinate to soft metals (Pt, Pd, etc.) by its sulfur atom[2]. Pt(Ⅱ) trends to bond to disulfoxides in cis-mode and such complexes have potential antitumor activity[2]. However, only few examples of such complexes have been structurally characterized[3]. We will report herein the crystal structure of a new Pt(Ⅱ) complex with a disulf… 相似文献