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新颖四核W-Cu-S簇合物[(η5-C5Me5)WS3Cu3Br(Py)3(dppm)](PF6)的合成和晶体结构 总被引:1,自引:0,他引:1
In the presence of NH4PF6, reaction of [PPh4][(η5-C5Me5)WS3Cu3Br(dppm)] with excess pyridine afforded red prismatic crystals, [(η5-C5Me5)WS3Cu3Br(Py)3(dppm)](PF6) (1). It was characterized by elemental analy-sis, IR, UV-vis and 1H NMR spectroscopy and X-ray diffraction. 1 crystallizes in an orthorhombic system with space group Pna21 and unit cell parameters a=2.1124(4)nm, b=1.8944(4)nm, c=1.3338(2)nm, V=5.3375(19)nm3, Z=4, Dc=1.807g·cm-3,Mr=1452.42, F(000)=2864, μ=4.342mm-1, R1=0.0487, wR2=0.1027. The structure of the cluster cation contains an incomplete cubane-like WS3Cu3 core where Cu(1) and Cu(2) atoms are bridged by a dppm ligand. Each of the three Cu atoms adopts a distorted tetrahedral coordi-nation geometry. The W-Cu(1), W-Cu(2) and W-Cu(3) distances are 0.27698(17)nm, 0.2772(17)nm, and 0.27065(9)nm, respectively. CCDC: 199845. 相似文献
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0IntroductionInthelastdecades,low-dimensionalcopper?-organichybridcomplexeshaveattractedmuchatten-tionduetotheirowncolorfulchemistry犤1~9犦andtheirpotentialapplicationsinfluorescentsensors犤10犦,olefinseparations犤11犦,andenantioseparation犤12犦.Intriguingly,thestructuresofsomepolycopper?anioniccomplexescouldbeinfluencedbythesize,shape,andchargedistributionoftheassociatedorganiccountercationssuchasquaternaryammoniumandphosphoniumcations犤13,14犦.Thebromocuprate?complexesdemon-stratelotsofexam… 相似文献
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固体粒子稳定的乳状液研究进展 总被引:2,自引:0,他引:2
综述了固体粒子对乳状液稳定性影响的有关研究进展。微细不溶的固体粒子构成重要的一类乳化剂,被水相和油相部分润湿的固体粒子能够有效地稳定乳状液。固体粒子稳定乳状液的效果取决于以下因素:粒子大小、粒子间相互作用和粒子的润湿性质。固体粒子存在的油-水界面表现出粘弹行为,这种粘弹界面膜可大大地提高空间位阻,减缓乳状液液珠间液膜变薄的速率,从而提高乳状液地稳定性。原油中的粘土、胶质、沥青质和石蜡等胶体粒子被证明对乳状液的稳定性起很大的作用。 相似文献
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合成了一个五核簇合物[MoS4CU4(dppm)4](NCS)2·4(CH3)2CHOH,用单晶X-射线衍射方法测得该晶体属于单斜晶系,空间群P21/a,晶胞参数a=2.0536(2),b=1.8095(2),c=3.1951(4)nm,β=100.220(4)°,V=11.6846(23)nm3,Z=4,Dc=1.349g/cm3,μ=10.87cm-1,F(000)=4896,R=0.085,Rw=0.089.其二价簇阳离子是一个MoS4单元被一个十六原子环[-Cu-P-C-P-]4包围在中心的"主客体"结构. 相似文献
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1 INTRODUCTION Polythiotungstate complexes can be prepared from the protonation of one sulfur atom of [WS4]2- and subsequent intramolecular redox reactions[1,2]. For example, [(S)2W(m-S)2W(m-S)2W(S)2]2 was formed by the acidification of a diluted aqueous solution of (NH4)2[WS4] with dilute H2SO4[3]. When a diluted aqueous solution containing [WS4]2 was acidified with 0.1mol/L HCl, [(S)2W(m-S)2(O)- W(H2O)(m-S)2W(S)2]2 was formed[4]. [(S)2W- (m-S)2(S)W(m-S)2W(S)2]2 was form… 相似文献
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Reactions of CuBr with equimolar PyHBr or γ-MePyHBr afforded two novel one-dimensional bromocuprate(Ⅰ)polymers {(PyH)3[Cu3Br6]}∞ (1) and {(γ-MePyH)2[Cu2Br4]}∞(2), respectively. Both 1 and 2 were charac-terized by IR, elemental analysis, and X-ray crystallography. Crystal data for 1: monoclinic, space group P21/n, a=0.93262(12)nm, b=1.3497(2)nm, c=1.9149(2)nm, β=93.465(7)°, V=2.4060(5)nm3, Z=4. Crystal data for 2: orthorhombic, space group Pbcm, a=0.8659(4)nm, b=1.5669(6)nm, c=1.2849(5)nm, V=1.7432(2)nm3, Z=4. The structure of 1 has a unique helical chain composed of [Cu3Br5] units and μ-bromide anions while that of 2 shows a linear chain consisted of [Cu2(μ-Br)2] units bridged by pairs of μ-Br atoms. CCDC: 1, 208412; 2, 208413. 相似文献
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前驱团簇[Et4N]4[MS4Cu4I6](M=Mo(1a);W(1b))与双齿桥连配体1,2-双(4-吡啶基)乙烷(bpe)在苯胺溶液中反应,生成2个结构相似的一维[MS4Cu4]团簇基配位聚合物{[MS4Cu4(bpe)2(ani)2I2]·3.5ani}n(M=Mo(2),W(3);ani=苯胺)。通过元素分析、红外光谱和X-射线单晶衍射对2和3进行了表征。晶体结构分析表明前驱团簇1a和1b中五核马鞍形[MS4Cu4]簇核分别在2和3中得以保留,2个桥连配体bpe连接相邻的簇核,在[111]方向延伸形成一维"Z"字形链结构。 相似文献