作者: Taryn D. Palluccio , Elena V. Rybak-Akimova , Subhojit Majumdar , Xiaochen Cai , Megan Chui
DOI: 10.1021/JA405395Z
关键词:
摘要: Thermodynamic, kinetic, and computational studies are reported for oxygen atom transfer (OAT) to the complex V(N[t-Bu]Ar)3 (Ar = 3,5-C6H3Me2, 1) from compounds containing N–O bonds with a range of BDEs spanning nearly 100 kcal mol–1: PhNO (108) > SIPr/MesCNO (75) PyO (63) IPr/N2O (62) MesCNO (53) N2O (40) dbabhNO (10) (Mes mesityl; SIPr 1,3-bis(diisopropyl)phenylimidazolin-2-ylidene; Py pyridine; IPr 1,3-bis(diisopropyl)phenylimidazol-2-ylidene; dbabh 2,3:5,6-dibenzo-7-azabicyclo[2.2.1]hepta-2,5-diene). Stopped flow kinetic OAT reactions show behavior influenced by both mode strength coordination O donor its ease transfer. Four categories observed depending upon magnitudes rate constants involved: (I) dinuclear following an overall third order law (N2O); (II) formation stable oxidant-bound complexes followed in separate step (PyO PhNO); (III) transient a...