Diverse reactivity of stereoisomers containing quadruply bonded dimolybdenum with oxygen: formation of [{Mo(η-N,N′-diisopropylbenzamidinato)oxo}2(μ-acetato)2(μ-oxo)]
摘要:
The reaction of quadruply bonded dimolybdenum complex, [Mo-2(mu-OAC)(4)] (1), with lithiated amidinato, Li[((NPr)-Pr-i)(2)CR] (R = Bu-t: 2a. Me: 2b, Ph: 2c), was investigated. The reaction of 1 with 2a afforded the dark-red solid, whereas the product was so highly unstable that the product was not able to be characterized. In the case of acetamidinato 2b, lantern-type mixed-ligand quadruply bonded dimolybdenum complex, [Mo-2(mu-OAc){mu-((NPr)-Pr-i)(2)CMe}(3)] (3), was obtained as a yellow solid. In the reaction with benzamidinato 2c, symmetrical lantern-type dimolybdenum complex, [Mo-2(mu-OAc)(2) {mu-((NPr)-Pr-i)(2)CPh}(2)] (4), was isolated as a yellow solid. In the latter reaction, intermediary red compound (5), which is considered to be stereoisomer of 4 possessing non-lantern-type skeleton, was formed. However, isolation of 5 as a single component was not successful due to isomerization to 4. Complex 5 readily reacted with dry oxygen to give dimolybdenum(V) complex, [{Mo(eta-((NPr)-Pr-i)(2)CPh)oxo}(2) (mu-OAc)(2)(mu-oxo)] (6), as a red solid. These complexes were characterized spectroscopically as well as, in some cases, by X-ray analyses. (c) 2005 Elsevier B.V. All rights reserved.
Diverse reactivity of stereoisomers containing quadruply bonded dimolybdenum with oxygen: formation of [{Mo(η-N,N′-diisopropylbenzamidinato)oxo}2(μ-acetato)2(μ-oxo)]
摘要:
The reaction of quadruply bonded dimolybdenum complex, [Mo-2(mu-OAC)(4)] (1), with lithiated amidinato, Li[((NPr)-Pr-i)(2)CR] (R = Bu-t: 2a. Me: 2b, Ph: 2c), was investigated. The reaction of 1 with 2a afforded the dark-red solid, whereas the product was so highly unstable that the product was not able to be characterized. In the case of acetamidinato 2b, lantern-type mixed-ligand quadruply bonded dimolybdenum complex, [Mo-2(mu-OAc){mu-((NPr)-Pr-i)(2)CMe}(3)] (3), was obtained as a yellow solid. In the reaction with benzamidinato 2c, symmetrical lantern-type dimolybdenum complex, [Mo-2(mu-OAc)(2) {mu-((NPr)-Pr-i)(2)CPh}(2)] (4), was isolated as a yellow solid. In the latter reaction, intermediary red compound (5), which is considered to be stereoisomer of 4 possessing non-lantern-type skeleton, was formed. However, isolation of 5 as a single component was not successful due to isomerization to 4. Complex 5 readily reacted with dry oxygen to give dimolybdenum(V) complex, [{Mo(eta-((NPr)-Pr-i)(2)CPh)oxo}(2) (mu-OAc)(2)(mu-oxo)] (6), as a red solid. These complexes were characterized spectroscopically as well as, in some cases, by X-ray analyses. (c) 2005 Elsevier B.V. All rights reserved.