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** Carbon acidity, carbanion basicity condensed-phase measurements **

In this chapter many of the basic elements of condensed phase chemical reactions have been outlined. Clearly, the material presented here represents just an overview of the most important features of the problem. There is an extensive literature on all of the issues described herein and, more importantly, there is still much work to be done before a complete understanding of the effects of condensed phase enviromnents on chemical reactions can be achieved. The theorist and experimentalist alike can therefore look forward to many more years of exciting and challenging research in this important area of physical chemistry. [Pg.895]

The treatment of equilibrium solvation effects in condensed-phase kmetics on the basis of TST has a long history and the literature on this topic is extensive. As the basic ideas can be found m most physical chemistry textbooks and excellent reviews and monographs on more advanced aspects are available (see, for example, the recent review article by Tnihlar et al [6] and references therein), the following presentation will be brief and far from providing a complete picture. [Pg.832]

This section presents tire basic tlieoretical principles of condensed phase electron transport in chemical and biochemical reactions. [Pg.2975]

The exact Eq. (4.2.17) takes into account the effect of the reservoir (the condensed phase) on the spectral line shape through the parameter 77. Consideration of a concrete microscopic model of the valence-deformation vibrations makes it possible to estimate the basic parameters y and 77 of the theory and to introduce the exchange mode anharmonicity caused by a reorientation barrier of the deformation vibrations thereby, one can fully take advantage of the GF representation in the form (4.2.11) which allows summation over a finite number of states. [Pg.94]

The Volta potential is defined as the difference between the electrostatic outer potentials of two condensed phases in equilibrium. The measurement of this and related quantities is performed using a system of voltaic cells. This technique, which in some applications is called the surface potential method, is one of the oldest but still frequently used experimental methods for studying phenomena at electrified solid and hquid surfaces and interfaces. The difficulty with the method, which in fact is common to most electrochemical methods, is lack of molecular specificity. However, combined with modem surface-sensitive methods such as spectroscopy, it can provide important physicochemical information. Even without such complementary molecular information, the voltaic cell method is still the source of much basic electrochemical data. [Pg.13]

Dr Gustav Schweikert of Bad Godesberg, described in Explosivstoffe 3, 197-200 (1955) and 4, 10-14 (1956) a theory of detonation of condensed-phase explosives, which is based on the assumption that such.detonations follow essentially the same basic laws as the combustion of colloidal propellants, and can be comprehended thru the same molecular and reaction-kinetic theories [Pg.511]

Explosions in the petrochemical industry can be classified into four basic types Vapor Cloud Explosions, Pressure Vessel Explosions, Condensed Phase Explosions, and Dust Explosions. Baker 1983 and CCPS Explosion Guidelines also provide information for characterizing some of these types of explosions. [Pg.11]

To formulate the basic model, we consider the transfer of a proton from a donor AHZ,+1 to an acceptor B 2 in the bulk of the solution. For reactions in the condensed phase, at any fixed distance R between the reactants, the transition probability per unit time W(R) may be introduced. Therefore, we will consider first the transition of the proton at a fixed distance R and then we will discuss the dependence of the transition probability on the distance between the reactants. [Pg.127]

These equations are important. They connect VPIE and ln(a"), both measurable properties, with basic theoretical ideas. The last two terms in Equation 5.10 and the last term in Equation 5.18 are generally small compared to the leading term. They are often neglected. The ratio of Q s in the leading term expresses VPIE or fractionation factor as the isotope effect on the equilibrium constant for the process

condensed =ideal vapor- It remains true, of course, that condensed phase Q s are complicated and difficult to evaluate. Except for especially simple systems (e.g. monatomic isotopomers) approximations are required for further progress. [Pg.144]

See also in sourсe #XX -- [ Pg.709 , Pg.710 , Pg.711 ]

** Carbon acidity, carbanion basicity condensed-phase measurements **

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