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Linear energy relationships

The hydrogen bond of sulphoxides and linear energy relationships. 552... [Pg.541]

These results clearly demonstrate that linear energy relationships can be established for the formation of hydrogen bonds between numerous Lewis bases (including sulphoxides) with Lewis acids. [Pg.551]

Recently, Kamlet and Taft introduced new elaborate parameters in order to explain the linear energy relationship for the formation of the hydrogen bond between HBA (hydrogen bond acceptor) and HBD (hydrogen bond donor). They treated several sulphoxides as HBA. The detailed presentations and actual treatments of these parameters have been described in their recent review article72. [Pg.552]

They have also demonstrated that a linear energy relationship exists between pKa values of sulphoxides and the hydrogen bonding ability which was determined by IR-stretching shift of the OH band in PhOH in CC14. Oae and coworkers173 determined the pKa values of diaryl sulphoxides and found that the substituent effect does not correlate with the Hammett o values but approximately with the a values. The pKa values thus obtained are summarized in Table 19. [Pg.567]

The rates of radical-forming thermal decomposition of four families of free radical initiators can be predicted from a sum of transition state and reactant state effects. The four families of initiators are trarw-symmetric bisalkyl diazenes,trans-phenyl, alkyl diazenes, peresters and hydrocarbons (carbon-carbon bond homolysis). Transition state effects are calculated by the HMD pi- delocalization energies of the alkyl radicals formed in the reactions. Reactant state effects are estimated from standard steric parameters. For each family of initiators, linear energy relationships have been created for calculating the rates at which members of the family decompose at given temperatures. These numerical relationships should be useful for predicting rates of decomposition for potential new initiators for the free radical polymerization of vinyl monomers under extraordinary conditions. [Pg.416]

Wolfe, N.L., Steen, W.C., Bums, L.A. (1980b) Phthalate ester hydrolysis Linear-energy relationships. Chemosphere 9, 403 08. [Pg.942]

Figure 11. Linear energy relationship over an extended domain of driving force. (Experimental data from Ref. 64.)... Figure 11. Linear energy relationship over an extended domain of driving force. (Experimental data from Ref. 64.)...
LINEAR ENERGY RELATIONSHIPS FOR SOME PERACID ADDITION REACTIONS... [Pg.74]

Suitable sensor array combinations can be easily predicted by computer simulation based on the Linear Energy Relationship (LSER) Models. This model correlates the solubility parameters with known physicochemical properties of the materials such as polarizability, polarity, acidity, basicity and geometrical factor, placed as sorption materials on the SAW s. Thus such a computer simulation leads to an optimization of the sensor array combination for a given task and replaces costly and time-consuming experimental work in the laboratory. [Pg.58]

See other pages where Linear energy relationships is mentioned: [Pg.555]    [Pg.555]    [Pg.556]    [Pg.561]    [Pg.565]    [Pg.555]    [Pg.555]    [Pg.556]    [Pg.561]    [Pg.565]    [Pg.1213]   
See also in sourсe #XX -- [ Pg.2 , Pg.3 , Pg.4 , Pg.5 ]



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Non-linear free energy relationships

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