Monoaryloxide Pyrrolide (MAP) Imido Alkylidene Complexes of Molybdenum and Tungsten That Contain 2,6-Bis(2,5-R<sub>2</sub>-pyrrolyl)phenoxide (R = i-Pr, Ph) Ligands and an Unsubstituted Metallacyclobutane on Its Way to Losing Ethylene
作者:Michael R. Reithofer、Graham E. Dobereiner、Richard R. Schrock、Peter Müller
DOI:10.1021/om400114h
日期:2013.5.13
We report the synthesis of Mo and W MAP complexes that contain O-2,6-(2,5-R2-pyrrolyl)2C6H3 (2,6-dipyrrolylphenoxide or ODPPR) ligands in which R = i-Pr, Ph. W(NAr)(CH-t-Bu)(Pyr)(ODPPPh) (4a; Ar = 2,6-disopropylphenyl, Pyr = pyrrolide) reacts readily with ethylene to yield a metallacyclobutane complex, W(NAr)(C3H6)(Pyr)(ODPPPh) (5). The structure of 5 in the solid state shows that it is approximately
我们报道了含有 O-2,6-(2,5-R 2 -吡咯基) 2 C 6 H 3 (2,6-二吡咯基苯氧基或 ODPP R )配体的 Mo 和 W MAP 配合物的合成,其中 R = i- Pr, Ph. W(NAr)(CH-t-Bu)(Pyr)(ODPP Ph ) ( 4a ; Ar = 2,6-二异丙基苯基,Pyr = 吡咯烷) 很容易与乙烯反应生成金属环丁烷络合物,W(NAr )(C 3 H 6 )(Pyr)(ODPP Ph ) ( 5 )。5的固态结构表明它近似于四角锥体,WC 4环跨越顶部和底部位置。这种 SP' 结构从未作为实际中间体被观察到,但现在必须被视为复分解反应的一个整体特征。