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Inside Cover: An Isolable and Monomeric Phosphorus Radical That Is Resonance‐Stabilized by the Vanadium(IV/V) Redox Couple (Angew. Chem. Int. Ed. 17/2007)
Author(s) -
Agarwal Paresh,
Piro Nicholas A.,
Meyer Karsten,
Müller Peter,
Cummins Christopher C.
Publication year - 2007
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200790068
Subject(s) - electron paramagnetic resonance , chemistry , delocalized electron , vanadium , unpaired electron , monomer , redox , radical , photochemistry , phosphorus , crystallography , inorganic chemistry , polymer , nuclear magnetic resonance , organic chemistry , physics
Bulky redox‐active metalloligands stabilize the phosphorus radical [ . P{NV[N(Np)Ar] 3 } 2 ] (Np=neopentyl) to the extent that it exists as a monomer even in the solid state. C. C. Cummins and co‐workers describe in their Communication on page 3111 ff. the EPR spectrum of the radical (see picture; P orange, N blue, V yellow), which reveals delocalization of the unpaired electron onto both vanadium centers. Radical bond formation at the phosphorus atom leads to diamagnetic products.