10-methyl-9-phosphaanthracene |
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| Authors: | C. Jongsma H. Vermeer F. Bickelhaupt W. Schäfer A. Schweig |
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| Affiliation: | Scheikundig Laboratorium der Vrije Universiteit, De Lairessestraat 174, Amsterdam-Z, The Netherlands;Fachbereich Physikalische Chemie der Universität, D 3550 Marburg, Biegenstraße 12, Germany |
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| Abstract: | The synthesis of 10-methyl-9-phosphaanthracene (1b) is described. Its stability is found to be intermediate between that of the unsubstituted parent compound (1a) and of the 10-phenyl derivative (1c). The electronic structure of this new phosphaaromatic system is studied, especially by photoelectron spectroscopy. As inductive and/or conjugative effects of the substituents are shown to be of minor importance, it is concluded that mainly steric effects stabilize the 9-phosphaanthracene system. |
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