Crystal Structures of the cis and trans Isomers of a Tetrathia [ 3.3.3 .3]cyclophane

ASIA unversity > 醫學暨健康學院 > 食品營養與保健生技學系 > 期刊論文 > Item 310904400/2232

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://asiair.asia.edu.tw/ir/handle/310904400/2232

题名:	Crystal Structures of the cis and trans Isomers of a Tetrathia [ 3.3.3 .3]cyclophane
作者:	Tosha-Barclay;Wallace Cordes;Ya-Chen Yang;Shaw-Tao Lin
贡献者:	保健營養生技學系
关键词:	Cyclophane;cis;trans;internal strain;tetrathia
日期:	1998-03
上传时间:	2009-11-02 01:50:47 (UTC+0)
摘要:	Both the cis and trans isomers of 3,11,18,26-tetrathiatricyclo[26.2.2.15,9.213,16.120,24] hexatriaconta-5,7,9,20,22,24-hexene have been prepared and structurally characterized. Each of these centrosymmetric tetrathia dimers includes two cyclohexane rings in chair conformations with either 1,4-cis or 1,4-trans bonding and two meta-substituted benzene rings. The cis isomer packs into the monoclinic space group P21/a with a = 10.485(3)Å, b = 10.3956(18)Å, c = 14.1343(10)Å, = 105.200(13)°, Z = 2 and refined to an R factor of 0.046. The trans isomer crystallizes in the monoclinic space group P21/c with a = 10.7217(12)Å, b = 5.6797(7)Å, c = 25.415(5)Å, = 96.001(12)°, Z = 2 and refined to an R factor of 0.043. In the cis structure each benzene ring faces a cyclohexane ring while in the trans structure the cyclohexane rings face one another.
關聯:	Journal of Chemical Crystallography, 28(3):171-175.
显示于类别:	[食品營養與保健生技學系] 期刊論文

文件中的档案:

档案	描述	大小	格式	浏览次数
index.html		0Kb	HTML	873	检视/开启
310904400-2232 .doc		30Kb	Microsoft Word	272	检视/开启

在ASIAIR中所有的数据项都受到原著作权保护.