Stabilization of iridium(IV) by monoanionic dialkyldiarylguanidinato ligands.
J Am Chem Soc
; 131(26): 9162-3, 2009 Jul 08.
Article
en En
| MEDLINE
| ID: mdl-19566092
Electron-rich tris(guanidinato) complexes of Ir(III), [Ir{ArNC(NR(2))NAr}(3)] (where R = Me or Et; Ar = Ph or 4-MeC(6)H(4)), were synthesized from the respective [Ir{ArNC(NR(2))NAr}(C(8)H(14))(2)] precursors (C(8)H(14) = cis-cyclooctene), are air-sensitive, and can be electrochemically oxidized in two one-electron transfer steps. The first electron transfer is reversible and occurs at much lower potentials than typical for Ir(III). Chemical oxidation by [FeCp(2)]PF(6) afforded isolable, paramagnetic Ir(IV) compounds, [Ir{ArNC(NR(2))NAr}(3)]PF(6), which were characterized by analytical and spectroscopic methods and a single-crystal structure determination, demonstrating that Ir(IV) is accessible in a nitrogen-donor ligand environment.
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1
Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
J Am Chem Soc
Año:
2009
Tipo del documento:
Article
País de afiliación:
Estados Unidos
Pais de publicación:
Estados Unidos