Formation and Structure of a Stable Monoradical Cation by Reduction of a Diphosphafulvenium Salt

One‐electron reduction of a diphosphafulvenium dication gives the first stable diphosphafulvenium monoradical cation (see scheme). An X‐ray crystal structure analysis, EPR measurements, and DFT calculations clearly show that reduction takes place at the exocyclic double bond and that the excess of e...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2006-10, Vol.45 (42), p.7036-7039
Main Authors: Biaso, Frédéric, Cantat, Thibault, Mézailles, Nicolas, Ricard, Louis, Le Floch, Pascal, Geoffroy, Michel
Format: Article
Language:English
Subjects:
Chemical Sciences
Coordination chemistry
density functional calculations
EPR spectroscopy
phosphorus
radicals
reduction
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Summary:One‐electron reduction of a diphosphafulvenium dication gives the first stable diphosphafulvenium monoradical cation (see scheme). An X‐ray crystal structure analysis, EPR measurements, and DFT calculations clearly show that reduction takes place at the exocyclic double bond and that the excess of electron density is stabilized by the two electron‐withdrawing phosphonium groups (see SOMO; P orange, C dark gray, H light gray).
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.200603009