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电力电容器浸渍剂应用概况与预测 被引量:5
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作者 张文斌 《电器工业》 2002年第7期48-49,共2页
前言 电力电容器浸渍剂即绝缘液体是生产电力电容器的主要材料,它的性能好坏直接影响电力电容器的质量和产量.本文将简要介绍烷基苯、苯基二甲苯基乙烷、苯基乙苯基乙烷、苄基甲苯在电力电容器行业的应用概况及预测,供参考.
关键词 苯基乙苯基乙烷 电力电容器 浸渍剂 预测
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Syntheses and Crystal Structures of 4,4′Diformyl-diphenoxyethane and 4,4′4′′-Triformyl-triphenoxytriethylamine 被引量:3
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作者 马震 刘世雄 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2002年第5期533-537,共5页
Two title compounds, 4,4?diformyl-diphenoxyethane (compound 1, C16H14O4) and 4,4?4创-triformyl-triphenoxytriethylamine (compound 2, C27H27NO6), were synthesized by condensation of 4-hydroxybenzaldehyde with 1,2-dichlo... Two title compounds, 4,4?diformyl-diphenoxyethane (compound 1, C16H14O4) and 4,4?4创-triformyl-triphenoxytriethylamine (compound 2, C27H27NO6), were synthesized by condensation of 4-hydroxybenzaldehyde with 1,2-dichloroethane and tris(2-chloroethyl)amine, respectively in dimethyl formamide in the presence of anhydrous potassium carbonate. The crystal data are: monoclinic, P21/c, a = 7.571(2), b = 12.608(3), c = 7.357(2) ? b = 105.823(6)? V = 675.7(2) 3, Mr = 270.3, Z = 2, Dc = 1.328 g/cm3, F(000) = 284, m(MoKa) = 0.096 mm-1, R = 0.0537 and wR = 0.2189 for compound 1; and monoclinic, P21/n, a = 11.7162(6), b = 9.0042(6), c = 22.908(2) ? b = 99.505(1)? V = 2383.5(3) ?, Mr = 461.50, Z = 4, Dc = 1.286 g/cm3, F(000)= 976, m(MoKa) = 0.091 mm-1, R = 0.0464 and wR = 0.1462 for compound 2. The molecule of compound 1 (dialdehyde) is located at the crystallographic inversion center nearby the midpoint of C(8)C(8A) single bond. The three chains in the molecule of compound 2 (trialdehyde) are of non-crystallographic pseudo-C3 symmetry, and each of them is quite planar. 展开更多
关键词 crystal structure DIALDEHYDE trialdehyde
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