α,ω-双(4-(4′-甲基)-偶氮苯基)苯氧甲基-1,1,3,3-四甲基二硅氧烷的合成和结构  

Synthesis and Structure of α,ω- Di(4-(4′-methyl) Substitute Azobenzene) Benzeneoxymethyl polymethylsiloxane

作　　者：李良学 张先亮[1,2] 王成瑞[1,2] 

机构地区：[1]湖北荆州师专化学系 [2]武汉大学化学系

出　　处：《分子科学学报》1999年第1期47-50,共4页Journal of Molecular Science

基　　金：国家自然科学基金

摘　　要：合成了（ＣＨ３（Ｃ６Ｈ４）Ｎ２（Ｃ６Ｈ４）ＯＣＨ２Ｓｉ（ＣＨ３）２２Ｏ，对其晶体结构及分子偶极矩进行了研究．结果表明，晶体属单斜晶系，Ｉ２Ａ空间群，晶胞参数如下：ａ＝２．１７８３４ｎｍ，ｂ＝０．８０３２５ｎｍ，ｃ＝２．０８８９５ｎｍ，β＝１１９．１９１°，Ｖ＝３１８２６ｎｍ３，Ｚ＝４，Ｄｃ＝１．２１６ｋｇ／ｍ３．分子偶极矩μ＝８．９３２×１０－３０Ｃ·ｍ．通过对分子结构和矩值的分析，说明了由刚性基团和柔性基团组成的端介晶基四甲基二硅氧烷的性能与结构之间的关系．The preparation of (CH 3(C 6H 4)N 2)(C 6H 4)OCH 2Si(CH 3) 2 2O is discussed in this paper. The crystal structure of compound is demonstrated by X-ray diffraction method,and the data of molecular dipole moment is obtained. The crystal is of monoclinic system and I 2/A space group.The crystal cell parameters are found to be a = 2.173 83 nm , b = 0.803 25 nm , c = 2.088 85 nm , β =119.191°, V = 3.128 62 nm 3 , Z =4, D c= 1.216 kg/m 3 . Moment μ = 8.932×10 -30 C·m .The relationship of the property and front mesomorphic group polymethylsiloxane composed of stiff and soft group is explained by analysis of its molecular structure and moment value.

关 键 词：α`ω-双(介晶基团)-四甲基二硅氧烷 液晶 晶体结构 分子偶极矩 

分 类 号：O627.41[理学—有机化学]