Eva Blokker, Martijn ten Brink, Dr. J. Martijn van der Schuur, Dr. Trevor A. Hamlin, Prof. Dr. F. Matthias Bickelhaupt
{"title":"Cover Feature: Origin of the Captodative Effect: The Lone-Pair Shielded Radical (ChemistryEurope 1/2023)","authors":"Eva Blokker, Martijn ten Brink, Dr. J. Martijn van der Schuur, Dr. Trevor A. Hamlin, Prof. Dr. F. Matthias Bickelhaupt","doi":"10.1002/ceur.202300038","DOIUrl":null,"url":null,"abstract":"<p><b>Radical shielding</b> weakens the C−C electron-pair bond between appropriately substituted methyl radicals. In their Research Article, F. Matthias Bickelhaupt and co-workers introduce the novel concept of the “Lone-Pair Shielded Radical“ (LPSR), in which the radical-electron orbital is surrounded, or shielded, by a lone-pair-like orbital. The latter causes closed-shell (Pauli) repulsion upon C−C bond formation, and thus reduces the stability of the dimer. This is shown on the left side of the cover illustration Dr. Daniela Rodrigues Silva designed. On the right side, the electron-pair bond is unhindered.\n <figure>\n <div><picture>\n <source></source></picture><p></p>\n </div>\n </figure>\n </p>","PeriodicalId":100234,"journal":{"name":"ChemistryEurope","volume":"1 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2023-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ceur.202300038","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ChemistryEurope","FirstCategoryId":"1085","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/ceur.202300038","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
Radical shielding weakens the C−C electron-pair bond between appropriately substituted methyl radicals. In their Research Article, F. Matthias Bickelhaupt and co-workers introduce the novel concept of the “Lone-Pair Shielded Radical“ (LPSR), in which the radical-electron orbital is surrounded, or shielded, by a lone-pair-like orbital. The latter causes closed-shell (Pauli) repulsion upon C−C bond formation, and thus reduces the stability of the dimer. This is shown on the left side of the cover illustration Dr. Daniela Rodrigues Silva designed. On the right side, the electron-pair bond is unhindered.
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