title: Synthesis and characterization of siloxy, aminoxy, and oxo complexes from the reaction of a tantalum amide silyl complex with oxygen.
abstract: (Me(2)N)(4)Ta-SiBu(t)Ph(2) (1) reacts with O(2) to give (Me(2)N)(4)Ta(OSiBu(t)Ph(2)) (2), (Me(2)N)(3)Ta(ONMe(2))(OSiBu(t)Ph(2)) (3), and the unusual mu-oxo amino (Me(2)N)(2)(Ph(2)Bu(t)SiO)(2)(mu,eta(2)-Me(2)NCH(2)NMe)(2)Ta(2)(mu-O)(2) (4) containing two bridging chelating (aminomethyl)amides -N(Me)CH(2)NMe(2). The dimer 4 was characterized by X-ray crystallography. 2 also reacts with O(2) to give both 3 and 4. Reaction pathways in the formation of these complexes are discussed. In reactions of O(2) with d(0) 1 and 2, oxidation of the ligands is the prevailing pathway.
authors.affiliation: Department of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996, USA.
authors.forename: He
authors.initials: H
authors.lastname: Qiu
authors.forename: Shu-Jian
authors.initials: SJ
authors.lastname: Chen
authors.forename: Chang-Sheng
authors.initials: CS
authors.lastname: Wang
authors.forename: Yun-Dong
authors.initials: YD
authors.lastname: Wu
authors.forename: Ilia A
authors.initials: IA
authors.lastname: Guzei
authors.forename: Xue-Tai
authors.initials: XT
authors.lastname: Chen
authors.forename: Zi-Ling
authors.initials: ZL
authors.lastname: Xue
mesh_terms: D000577:Amides / Q000737:chemistry*; D018360:Crystallography, X-Ray; D008958:Models, Molecular; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry; D017646:Organosilicon Compounds / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry*; D013635:Tantalum / Q000737:chemistry*
chemical_list: D000577:Amides; D009942:Organometallic Compounds; D017646:Organosilicon Compounds; D010087:Oxides; D013635:Tantalum; D010100:Oxygen