Premium
Unusual Reactivity of a Nickel N‐Heterocyclic Carbene Complex: tert ‐Butyl Group Cleavage and Silicone Grease Activation
Author(s) -
Caddick Stephen,
Cloke F. Geoffrey N.,
Hitchcock Peter B.,
de K. Lewis Alexandra K.
Publication year - 2004
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200460955
Subject(s) - carbene , dimer , silicone , siloxane , chemistry , grease , nickel , cleavage (geology) , polymer chemistry , silicone oil , reactivity (psychology) , medicinal chemistry , organic chemistry , materials science , catalysis , composite material , medicine , alternative medicine , pathology , fracture (geology) , polymer
Reaction lubrication? The reaction between [Ni(1,5‐cod) 2 ] (cod=cyclooctadiene) and 1,3‐bis‐ tert ‐butylimidazol‐2‐ylidene in the presence of silicone grease affords the siloxane bridged dimer [{Ni[C(N t BuCH) 2 ][O(Me 2 SiOSiMe 2 )‐μ‐O]} 2 ]. In a greaseless apparatus, the same reaction yields the dimer 1 (see structure), via two structurally characterized intermediates.