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Phosphorus, Sulfur, and Silicon and the Related Elements Volume 186, 2011 - Issue 10
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Original Articles

Is the 1JPSe Coupling Constant a Reliable Probe for the Basicity of Phosphines? A 31P NMR Study

Udo Beckmann Institut für Anorganische Chemie und Strukturchemie, Lehrstuhl I: Bioanorganische Chemie und Katalyse, Heinrich-Heine-Universität, Dusseldorf, Germany
,
Diyana Süslüyan Institut für Anorganische Chemie und Strukturchemie, Lehrstuhl I: Bioanorganische Chemie und Katalyse, Heinrich-Heine-Universität, Dusseldorf, Germany
&
Peter C. Kunz Institut für Anorganische Chemie und Strukturchemie, Lehrstuhl I: Bioanorganische Chemie und Katalyse, Heinrich-Heine-Universität, Dusseldorf, Germany
Pages 2061-2070 | Received 06 Sep 2010, Accepted 22 Nov 2010, Published online: 14 Oct 2011
 
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Abstract

The influence of different heteroaryl and functionalized aryl substituents on the electron-donating ability and basicity of the phosphorus atoms in heteroaryl phosphines and diphosphines has been determined by the use of the direct 1JPSe coupling constants of the corresponding selenides. The generality of the use of 31P–77Se spin–spin coupling constants as probe for the basicity of phosphines is discussed as well as the scope and limits of this concept.

GRAPHICAL ABSTRACT

Acknowledgments

D. Süslüyan thanks all the members of the institute for providing the organophosphorus compounds.

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