An Incremental System To Predict the Effect of Different London Dispersion Donors in All‐
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‐Substituted Azobenzenes
作者:Chiara Di Berardino、Marcel A. Strauss、Dominic Schatz、Hermann A. Wegner
DOI:10.1002/chem.202104284
日期:2022.2.24
An incremental system for London dispersion has been developed that allows an easy back-of-the-envelope estimation when systematically altering the London dispersion donors. A simple equation is proposed that nicely reproduces the experimental results within error.
Nitrosation of Aryl and Heteroaryltrifluoroborates with Nitrosonium Tetrafluoroborate
作者:Gary A. Molander、Livia N. Cavalcanti
DOI:10.1021/jo300551m
日期:2012.5.4
converted into a variety of different substituents in a late synthetic stage. In this paper, we disclose a mild, selective, and convenient method for the ipso-nitrosation of organotrifluoroborates using nitrosonium tetrafluoroborate (NOBF4). Aryl- and heteroaryltrifluoroborates were converted into the corresponding nitroso products in good to excellent yields. This method proved to be tolerant of a broad range
Attraction or Repulsion? London Dispersion Forces Control Azobenzene Switches
作者:Luca Schweighauser、Marcel A. Strauss、Silvia Bellotto、Hermann A. Wegner
DOI:10.1002/anie.201506126
日期:2015.11.2
entirely repulsive through steric hindrance. Such groups have additional attractive effects arising from weak Londondispersionforces between the neutral atoms. Steric interactions are recognized to have a strong influence on isomerization processes, such as in azobenzene‐based molecular switches. Textbooks indicate that steric hindrance destabilizes the Z isomers. Herein, we demonstrate that increasing