Catalytic aerobic oxidation by a trianionic pincer Cr(III)/Cr(V) couple.
Aerobic oxidation that incorporates both O atoms into a substrate (PPh(3)) is achieved by employing a Cr(III)/Cr(V)[triple bond]O catalytic couple. A terphenyl trianionic pincer ligand stabilizes a high oxidation state Cr(V)[triple bond]O complex, and both the reduced (Cr(III), IR/X-ray) and oxidized (Cr(V)[triple bond]O, electron paramagnetic resonance/IR/X-ray) participants in the catalytic cycle are characterized.
O'Reilly
Matthew
M
University of Florida, Department of Chemistry, Center for Catalysis, P.O. Box 117200, Gainesville, Florida 32607, USA.
Falkowski
Joseph M
JM
Ramachandran
Vasanth
V
Pati
Mekhala
M
Abboud
Khalil A
KA
Dalal
Naresh S
NS
Gray
Thomas G
TG
Veige
Adam S
AS