@article {1605, title = {Ortho-selective C-Hactivation of substituted benzenes effected by a tungsten alkylidene complex without substituent coordination}, journal = {Organometallics}, volume = {25}, number = {17}, year = {2006}, note = {ISI Document Delivery No.: 070PZTimes Cited: 13Cited Reference Count: 36Tsang, Jenkins Y. K. Buschhaus, Miriam S. A. Legzdins, Peter Patrick, Brian O.}, month = {Aug}, pages = {4215-4225}, type = {Article}, abstract = {{Gentle thermolysis of the bis(neopentyl) complex Cp*W(NO)(CH2CMe3)(2) (1) at 70 degrees C in various substituted benzenes results in the loss of neopentane and the generation of the transient alkylidene complex Cp*W(NO)(=CHCMe3) (A), which subsequently effects single C-H bond activations of the benzenes. These activations exhibit a pronounced selectivity for the C-H linkages ortho to the benzene substituents. Thus, thermal reactions of 1 with C6H5X lead to the preferential formation of the corresponding Cp*W( NO)(CH2CMe3)(o-C6H4X) complexes, the ortho-selectivity, i. e.}, keywords = {CLEAVAGE, CRYSTAL-STRUCTURE, ELIMINATION, H BONDS, IRIDIUM, MECHANISM, METAL-COMPLEXES, {ARYL}, isbn = {0276-7333}, url = {://000239536800028}, author = {Tsang, J. Y. K. and Buschhaus, M. S. A. and Legzdins,Peter and Patrick, B. O.} }