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结合空间网架节点球在特定分度夹紧装置上的数控加工的实际过程,论述了分度夹紧装置的原理,对空间任意两点球心的误差进行了分析,利用变换矩阵理论建立了分度过程球心点的坐标计算公式及球心误差计算公式,并对实际工程螺栓节点球进行了球心误差计算. 相似文献
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芳基取代的四甲基环戊二烯 C5HMe4Ar(Ar=Ph,4-CH3Ph,4-OCH3Ph,4-ClPh,4-BrPh) 分别与Re2(CO)10在二甲苯中加热回流,得到了5个单核配合物[(η5-C5Me4Ar)Re(CO)3](Ar=Ph (1),4-CH3Ph (2),4-OCH3Ph (3),4-ClPh (4),4-BrPh (5)]。通过元素分析、红外光谱、核磁共振氢谱对配合物1~5的结构进行了表征,用X射线单晶衍射法测定了配合物的结构。同时,研究了这五种配合物在芳香族化合物Friedel-Crafts烷基化反应中的催化活性。 相似文献
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针对网架螺栓节点球现行加工方法的不足 ,提出了虚拟球心基准、正交合成分度的方法 ,实现了螺纹孔在全球面任意分布的螺栓节点球的无基准加工 ,给出了基于正交合成分度方法的分度角度计算方法 ,为螺栓节点球数控加工自动编程做好了准备 相似文献
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用新方法研究了Banach空间中渐近非扩张映像不动点的迭代逼近问题,去掉了定义域和值域的有界性假设. 相似文献
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The ligands (C5Me4R) [R =n-Butyl (1), Benzyl (2), PhMe-2 (3)] reacted with Ru3(CO)12 in refluxing xylene to give corresponding new substituted tetramethylcyclopentadienyl diruthenium metal carbonyl complexes [(η5-C5Me4R)Ru(CO)( μ-CO)]2 [R=n-Butyl (4), Benzyl (5), PhMe-2 (6)], respectively. The three new complexes were characterized by elemental analysis, IR and 1H NMR spectra. The crystal structure of complex 5 was determined by single crystal X-ray diffraction. The X-ray crystal structure of complex 5 confirms the structure with bridging and terminal CO groups. CCDC: 709601. 相似文献
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Two monomeric cobalt(Ⅱ)complexes,[CoL(N3)] ClO4(1)and CoL(N3)2(2),where L is tris((3,5-dimethylpyrazol-1-yl)methyl)amine,were synthesized and their crystal structures were determined by X-ray diffraction technique.Complex 1 is five coordinated with one azide nitrogen atom and four nitrogen atoms of the tris((3,5-dimethylpyrazol-l-yl)-methyl)amine ligand,and the metal center is in distorted trigonal bipyramidal environment.Complex 2 is six coordinated distorted octahedron with the two azide nitrogen atoms and four nitrogen donors of the tris((3,5-dimethylpyrazol-1-yl)-methyl)amine ligand.The solution behaviors of the title complexes have been further investigated by UV-Vis,and 1H NMR analysis.It is found that the formation of 1 and 2 depends on the molar ratio of the azide ion to metal salt and ligand Complex 1 attached with one azide group is more stable and easy to generate than complex 2 incorporated with two azide groups,and the reasons were well discussed. 相似文献
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由6,6-四亚甲基富烯与Ru3(CO)12在二甲苯中加热回流,合成了一个新的双核配合物(η5-C10H11)2Ru2(CO)2(μ-CO)2。通过元素分析、红外光谱、核磁共振氢谱对其结构进行了表征,用X射线单晶衍射法测定了配合物的结构,结果表明:晶体属于三斜晶系,P空间群,a=0.641 57(19)nm,b=0.761 3(2)nm,c=1.192 4(3)nm,α=89.973(4)°,β=87.143(4)°,γ=69.666(4)°,V=0.545 3(3)nm3,Dc=1.756 g·cm-3,μ=1.412 mm-1,F(000)=286,Z=1,R1=0.024 0,wR2=0.066 7。晶体结构表明6,6-四亚甲基富烯在反应过程中发生了双键的异构。 相似文献