2. What is the meaning of VSEPR?The corresponding concept is a good tool for ... and was established by...?Valence Shell Electron Pair Repulsion Concept Predicting the shape/structure of moleculesIt was established by Gillespie and Nyholm in the year 1957....
a minimum dimension of at least 7.4 Å, as described by Frilette et al. in J. Catalysis 67,218-222 (1981 ). See also Chen et al. Shape-Selective Catalysis in Industrial Applications, (Chemical industries; Vol. 36) Marcel Dekker Inc., New York 1989, ISBN 0-8247-7856-1 and Hoeld...
In Sb2O3 and Sb/V/Ce/Ti catalysts, the intensity and shape of these peaks are related with the oxidation state of the absorbing Sb atoms. It seems that the peak intensity and width of the peak A in fresh and SO2 treated Sb/V/Ce/Ti samples represent the presence of Sb in Sb(III)...
almost remains constant (86 ± 4 kJ mol−1), evidencing that the active sites of Mo1/Fe2O3are uniform. Owing to the acid-redox properties and the similar structure as the dinuclear active site of V2O5-based catalysts2,26, and the same catalytic behavior as the dinuclear Cu si...
(such as CuO and Co3O4) with controllable particle size, shape and composition simply through changing the calcination atmospheres [33]. By thermolysis of differently shaped MOFs, a series of CuO/Cu2O composites with cube, octahedron and rod-like morphologies were obtained by Lu group [35]. ...
[80]. The approach of the Lewis base prompted large-scale geometry distortion in TF4, changing its shape from tetrahedral to trigonal bipyramidal. This transformation led to the formation of two types of dimers with σ-hole and π-hole characteristics. While the latter were more stable with ...
An axial spin Hamiltonian model was used for the simulation of each spectrum with a Voigtian line shape and an equal line width for all the species. The EPR spectra were recorded at room temperature for all Cu-SSZ-13 samples also in their dehydrated form. The dehydrated samples were ...