User:Canonsx100

My interests: Digital Cameras, Cell Phones, Camcorders and Film Cameras.

I'm going to write an article about Canon SX100 for Wikipedia, because there is no information about this new canon digital camera.

In addition, I am fond of Physics

The signs of average reactionary constants found in the paper correspond to the mechanism of electrophilic proton substitution in surface silanol groups, as it was formerly supposed for these compounds. The high deviations of these magnitudes testify about significant heterogeneity of the reactive sites. Formation of transient complexes with hydrogen or donor–acceptor bonds involving surface site and reagent molecule, can make a contribution into the height of chemisorption activation barrier. The possible methods for the calculation of such complexes stability, chemisorption activation energies, and their connection with parameters of the reagent electronic structure have been analyzed by the authors of works. Using quantum-chemistry methods, the ionization potential and electron affinity, positive and negative charges on atoms of the modifying reagent molecule were calculated. Relying on such data, it is possible to evaluate stability of transient complexes between the reagent molecules and hydroxyl groups of the silica surface. As is shown, in the majority of cases, chemisorption activation energies of a number monofunctional organosilicon compounds, containing trimethylsilyl group (CH3)3SiX, are increased with decreasing Si–X bond energy, increasing inductive constant of the substituent X and decreasing reaction enthalpies. The majority linear correlations was found to be observed between reaction activation energies of the appropriate organosilicon compounds with hydroxyl groups of the silica surface and electron affinity of these reagents, or parameters, including this quantity. Gun’ko, with co-authors, within the framework of theory of a transient state and statistical theory of absolute reaction rates using adiabatic or dynamic coordinate of reaction, have calculated rate constants of surface reactions of various types. They had analyzed the approaches to description of nature of the activation barriers, dynamic changes in local electronic states of attacking molecules, and surface sites. It was demonstrated that the contribution to energy of activation for the majority of reactions involving surface silanol groups on 50%–70%, is governed by the expenditures on HC-transfer in cyclic transient complexes.