Chromium-53 nuclear magnetic resonance studies of pentacarbonylchromium carbene complexes
作者:Andreas. Hafner、Louis S. Hegedus、Guy. DeWeck、Bruce. Hawkins、Karl H. Doetz
DOI:10.1021/ja00233a018
日期:1988.12
The sup 53}Cr NMR spectra of 46 chromium-carbene complexes were recorded, and chemicalshift and line width data are reported, along with associated infrared, uv-visible, and sup13}CNMR spectroscopic data. The sup 53}Cr chemicalshifts correlated very well with the donor-acceptor properties of the carbene ligand and were quite sensitive to steric influences on efficiency of pi}-overlap of the
A matrix isolation and flash photolysis study of the cyclization reactions of chromium amino carbenes
作者:K.O Doyle、M.L Gallagher、M.T Pryce、A.D Rooney
DOI:10.1016/s0022-328x(00)00640-9
日期:2001.1
The photochemistry of chromium amino carbene complexes have been studied using IR and UV–vis spectroscopy in matrices at 12 K and using UV–vis spectroscopy following laser flashphotolysis in solution at room temperature (r.t.). The complexes studied can be divided into two classes. The Class 1 complexes are (CO)5Cr[C(NMe2)Me], (CO)5Cr[C(NBz2)Me], (CO)5Cr[C(NMe2)Ph] which are known to have a low or