Dissodation energy

Fig.3-18. Unitaryprotonlevelofaceticacidandtransferofprotons >I = acidic dissociation energy of acetic add D = basic dissodation energy of acetic add.

It is interesting to point out the similarity between the proton level diagram of aqueous solutions and the electron level diagram of semiconductors as shown in Fig. 3-20. The ionic dissodation energy (1.03 eV) of water molecule H2O to form an ion pair of H30 -0H is the energy gap between the imitary acidic proton level and the unitary basic proton level this may correspond to the band gap of semiconductors. The concentration product, of the addic... 

We now consider in turn the two alternatives that the exdted 0 atom is in a state or a state. If it is in a D state then the dissodation energy is equivalent to... 

P.J. Dagdigian, H.W. Ciuse, R.N. Zare, Laser fluorescence study of AlO, formed in the reaction Al -FO2 product state distribution, dissodation energy and radiative Ufetime. J. Chem. Phys. 62, 1824(1975)... 

Staley and coworkers Ipive provided direct measurenrent of HSAB effects in gas-phase dissodation energies between transition metals (where the principle has... 

Polyalkoxy and polyperoxy radicals formed from hydroperoxide decomposition are unstable intermediates, owing to the presence of an unpaired electron which weakens the dissodation energy for bonds in the yS-position by some 100 kj mol . Monomolecular yS-scission is the main mechanism for a decrease in MW and accounts for the variety of oxygenated products observed during oxidative degradation (see Section 15.4.4.6). 

This interpretation is supported by inspection of measured activation energies of the observed decomposition rate coefli-dent. In Figure 8, numbers for the activation energy at low pressure a(0 bar) are plotted against bond dissodation energy of the R-H bond (BDE(R-H)), which serves as a measure for the stability of radical R. For primary peroxyesters, the activation energy is insensitive toward BDE(R-H), whereas for secondary and tertiary peroxyesters, where the radical R is produced early after primary 0-0 bond dissodation, the... 

Chart 3.2 Several model compounds and their C-S bond lengths and dissodation energies. 

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