2253-85-2Relevant articles and documents
High-Field NMR Determination of Magnetic Susceptibility Tensors and Angular Correlation Factors of Halomethanes
Bothner-By, A. A.,Dadok, J.,Mishra, P. K.,Zijl, P. C. M. Van
, p. 4180 - 4184 (1987)
Quadropolar splittings in the high resolution deuteron spectra of deuterated haloforms (CX3(2)H, X=Cl, Br, I) and methylene halides (CX2H(2)H) have been measured at 14.35 T (93.5 MHz) and used to determine the anisotropy or asymmetry of their molecular magnetic susceptibility tensors.By combination with the known isotropic susceptibilities, the principal susceptibility tensors have been deduced and decomposed into bond susceptibility tensors.Neither the average susceptibilities nor the principal susceptibility tensor elements of the complete halomethane series follow Pascal's additivity rules.The phenomenon is tentatively attributed to a variable paramagnetic contribution perpendicular to the X-bond.Angular correlation Kirkwood g2 factors have been determined for CHCl3 and CHBr3 and are compared with available literature data.
Nickel(0) - Catalyzed Reactions of Bicyclopentane and Electron-Deficient Olefins
Takaya, H.,Suzuki, T.,Kumagai, Y.,Yamakawa, M.,Noyori, R.
, p. 2846 - 2854 (2007/10/02)
In the presence of a catalytic amount of bis(acrylonitrile)nickel(0), bicyclopentane suffers from the cleavage of the central ? bond and cycloadds to electron-deficient olefins such as methyl acrylate, acrylonitrile, dimethyl maleate, and dimethyl fumarate to give bicycloheptane derivatives.The stereochemistry and mechanism of the catalyzed cycloadditions have been elucidated by use of deuterated bicyclopentanes.
