Inorganic Chemistry, Vol.48, No.7, 3073-3079, 2009
Synthesis and Characterization of Siloxy, Aminoxy, and Oxo Complexes from the Reaction of a Tantalum Amide Silyl Complex with Oxygen
(Me2N)(4)Ta-(SiBuPh2)-Ph-t (1) reacts with O-2 to give (Me2N)(4)Ta((OSiBuPh2)-Ph-t) (2), (Me2N)(3)Ta(ONMe2)((OSiBuPh2)-Ph-t) (3), and the unusualy-oxo amino (Me2N)(2)((Ph2BuSiO)-Si-t)(2)(mu,eta(2)-Me2NCH2NMe)(2)Ta-2(mu-O)(2) (4) containing two bridging chelating (aminomethyl)am ides -N(Me)CH2NMe2. The dimer 4 was characterized by X-ray crystallography. 2 also reacts with 02 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.