S. Nirmala, E. Kamala, L. Sudha, E. Ramesh, R. Raghunathan
{"title":"Crystal Structure of 1,4-Dimethyl 2.5[2′-dispiroindane-1,3-dione]piperazine","authors":"S. Nirmala, E. Kamala, L. Sudha, E. Ramesh, R. Raghunathan","doi":"10.2116/ANALSCIX.24.X101","DOIUrl":null,"url":null,"abstract":"The title compound (C22H18N2O4) crystallizes in monoclinic space group P21/n with one-half molecule in the asymmetric unit. The complete molecule is generated by inversion symmetry. The structure was solved by direct methods and refined by full-matrix least-squares procedures to a final R = 0.046 and wR = 0.1187 using 2766 reflections. The piperazine and the cyclo-pentane rings adopt chair and envelope conformations, respectively. The molecular packing is stabilized by C-H…O and π…π interactions in addition to van der Walls forces.","PeriodicalId":7796,"journal":{"name":"Analytical Sciences: X-ray Structure Analysis Online","volume":"36 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2008-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Analytical Sciences: X-ray Structure Analysis Online","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.2116/ANALSCIX.24.X101","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
The title compound (C22H18N2O4) crystallizes in monoclinic space group P21/n with one-half molecule in the asymmetric unit. The complete molecule is generated by inversion symmetry. The structure was solved by direct methods and refined by full-matrix least-squares procedures to a final R = 0.046 and wR = 0.1187 using 2766 reflections. The piperazine and the cyclo-pentane rings adopt chair and envelope conformations, respectively. The molecular packing is stabilized by C-H…O and π…π interactions in addition to van der Walls forces.