A persistent alkylaluminum peroxide: surprising stability of a molecule with strong reducing and oxidizing functions in close proximity.
The reaction of the beta-diketiminato coordinated aluminum dihydride, [{HC[C(Me)N-C(6)H(5)](2)}AlH(2)] (1) with bis(trimethylsilyl)methyllithium afforded the monoalkylaluminum derivative [{HC[C(Me)N-C(6)H(5)](2)}Al(H)-CH(SiMe(3))(2)] (2) by the precipitation of lithium hydride. Interestingly, treatment of 2 with tert-butyl hydrogenperoxide did not result in the formation of the simple oxidation product containing a hydroxo or alkoxo group, instead, elemental hydrogen was released and the hydrido ligand attached to aluminum was replaced by an intact tert- butylperoxo group. The Al-C bond, which normally is extremely sensitive towards an attack of oxygen, was not affected. Hence, the product exhibits quite conflicting chemical properties in a close proximity: a strongly reducing Al-C bond beside an oxidizing peroxo group.
Uhl
Werner
W
Institut für Anorganische und Analytische Chemie, Universität Münster and NRW Graduate School of Chemistry, Corrensstrasse 30, 48149 Münster, Germany. uhlw@uni-muenster.de
Jana
Barun
B
D000535:Aluminum / Q000737:chemistry*; D018360:Crystallography, X-Ray; D008024:Ligands; D008958:Models, Molecular; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D010084:Oxidation-Reduction; D010545:Peroxides / Q000138:chemical synthesis / Q000737:chemistry*
D008024:Ligands; D009942:Organometallic Compounds; D010545:Peroxides; D000535:Aluminum