{"title":"Crystal and molecular structure of 4,7-di-(2-thienyl)-4,5,6,7-tetrahydrobenzo[b]thiophen","authors":"D. M. Hawley, G. Ferguson","doi":"10.1039/J29710000843","DOIUrl":null,"url":null,"abstract":"The crystal structure of the title compound, the ‘pentamer’ fraction of the acid-catalysed polymerisation of thiophen, has been determined by direct methods from three-dimensional photographic data. The crystals are monoclinic, space group, P21/c(C52h), with a= 14·13, b= 7·68, c= 13·78 A and β= 104·1°. The disordered structure has been refined by least-squares methods to R 0·111 over 2307 independent reflexions. The cyclohexene ring adopts the half-chair conformation with the thienyl substituents in a cis-configuration.","PeriodicalId":17268,"journal":{"name":"Journal of The Chemical Society B: Physical Organic","volume":"34 1","pages":"843-846"},"PeriodicalIF":0.0000,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of The Chemical Society B: Physical Organic","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1039/J29710000843","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 3
Abstract
The crystal structure of the title compound, the ‘pentamer’ fraction of the acid-catalysed polymerisation of thiophen, has been determined by direct methods from three-dimensional photographic data. The crystals are monoclinic, space group, P21/c(C52h), with a= 14·13, b= 7·68, c= 13·78 A and β= 104·1°. The disordered structure has been refined by least-squares methods to R 0·111 over 2307 independent reflexions. The cyclohexene ring adopts the half-chair conformation with the thienyl substituents in a cis-configuration.
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