The catalytic autoxidation of azide by Co(tim)2+ was studied. In the presence of dioxygen Co(tim)(H2O)22+ (tim = 2,3,9,10-tetramethyl-1,4,8,11-tetraazacyclotetradeca-1,3,8,10-tetraene) reacts with azide in a complex process to produce Co(tim)(N3)(x)/((3-x))+ (x = 1 or 2) (λ(max) at 340 nm) and dinitrogen. The reaction is clearly catalytic with up to several hundred turnovers. The dioxygen dependence of the reaction implies the involvement of an oxygen adduct, stabilized by an axial azide ligand. (C) 2000 Elsevier Science S.A.
Bibliographical noteFunding Information:
This study was supported in part by a grant from the Budgeting and Planning Committee of The Council of Higher Education and the Israel Atomic Energy Commission. D.M. wishes to express his thanks to Mrs Irene Evens for her ongoing interest and support.
- Azamacrocyle complexes
- Catalyzed autoxidation
- Cobalt complexes