Copper Dioxygen Adducts: Formation of Bis(μ-oxo)dicopper(III) versus (μ-1,2)Peroxodicopper(II) Complexes with Small Changes in One Pyridyl-Ligand Substituent
作者:Debabrata Maiti、Julia S. Woertink、Amy A. Narducci Sarjeant、Edward I. Solomon、Kenneth D. Karlin
DOI:10.1021/ic702437c
日期:2008.5.1
7- (1) (8)O 2 reactivity, and a H-atom abstraction by 7-O 2 is apparent from study of its reactions with ArOH substrates, as well as the determination of k H/ k D approximately 7 in the toluene oxygenation (i.e., PhCH 3 vs PhCD 3 substrates). Proposed courses of reaction are presented, including the possible involvement of PhCH 2OO (*) and its subsequent reaction with copper(I) complex, the latter derived
由(配体)-Cu(I)/ O 2反应性形成特定Cu 2O 2异构体的偏好可以通过具有6-三脚架四齿配体的三个供体基团之一上的吡啶基取代基。当该取代基为-XHR基团(X = N或C)时,传统的Cu(I)/ O 2加合物形成(mu-1,2)过二铜(II)物种(A)。然而,当取代基是稍大的XR 2部分芳基或NR 2(R不等于H)}时,优选双(μ-氧代)二铜(III)结构(C)。双(μ-氧代)双金属(III)物种之一[[(6tbp)Cu(III)} 2(O(2-))2](2+)(7-O 2)(6tbp =(6-(t)Bu-苯基-2-吡啶基甲基)双(2-吡啶基甲基)胺,这是第一次,观察到外源甲苯或乙苯烃的氧合反应。发生了典型的单加氧酶化学反应:苯甲醛产物包括一个18-O原子,用于甲苯/ 7-(1)(8)O 2反应,并且通过研究其与ArOH底物的反应可以明显看出H-原子被7-O 2提取。 ,以及在甲苯氧化中测定k