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Author(s) -
Loss Sandra,
Magistrato Alessandra,
Cataldo Laurent,
Hoffmann Stefan,
Geoffroy Michel,
Röthlisberger Ursula,
Grützmacher Hansjörg
Publication year - 2001
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 - 10.1002/1521-3773(20010216)40:4<635::aid-anie6350>3.0.co;2-0
Subject(s) - acetonitrile , radical , chemistry , salt (chemistry) , orange (colour) , photochemistry , cover (algebra) , organic chemistry , food science , mechanical engineering , engineering
The cover picture shows the array of colors observed in the synthesis of the long‐lived phosphorus radicals [Mes*MeP−PMes*] . ( 3 ; Mes*=2,4,6‐ t Bu 3 C 6 H 3 ). These colors were obtained by layering a colorless solution of the electron‐rich tetrakis(dimethylamino)ethylene ( 2 ) in acetonitrile onto a yellow solution of the phosphenium salt [Mes*MeP=PMes*] + [O 3 SCF 3 ] − ( 1 ) in acetonitrile. An immediate intense green color characteristic of solute 3 formed at the phase boundary. At the same time orange‐red crystals of 3 appeared and deposited on the walls of the container. The red color denotes the formation of the radical cation [(Me 2 N) 3 C 2 ] .+ . More about this reaction, which has allowed the first isolation of diphosphanyl radicals, is described by Geoffroy, Grützmacher, and co‐workers on page 723 ff.