Spin statistical factors

The steric factor P is high enough for the bimolecular reaction to occur when two radicals met in the cage. This reaction is limited only by translational diffusion of the reacting radicals and depends on the viscosity of the solvent. The rate constant of such reaction is close to the frequency of encounters of radicals, namely, k = a, kn = 0.25 x 47rrABZ)AB = RT 100007] where [Pg.537]

J. Saltiel and B. W. Atwater, Spin-statistical factors in diffusion-controlled reactions, Adv. Photochem. 14, 1-90 (1988). 

Another instance where spin statistical factors are important involves quenching of triplet donors by transition metal ions... 

The spin statistical factor is found from Wigner s spin rules in this case, a — n/3m. Recent work has been discussed by Wilkinson and Tsiamis... 

Diffusion-Controlled Reactions, Spin-Statistical Factors in (Saltiel and... 

Because the energy differences 8E between the sublevel states of each multiplet of mA and nB are very small, 8E ambient temperature and above, they are nearly equally populated under equilibrium conditions (Boltzmann s law, Equation 2.9) and the probability of the formation of any given encounter spin state will be equal to all the others as there are mn choices, it will be equal to the spin-statistical factor a = (mn) ... 

Saltiel, J., Atwater, B. W., Spin statistical Factors in Diffusion controlled Reactions, Advances in Photochemistry, Vol. 14, John Wiley Sons, Inc., New York, 1988, pp. 1 90. 

SPIN-STATISTICAL FACTORS IN DIFFUSION-CONTROLLED REACTIONS... 

It is important to note that the spin-statistical factor is obtained here without having to rely on a theoretical value for fedif- The values provide an empirical measure of fcutf in ideal reference system, since diffussion coefficients and encounter distances must cancel in the ratio. 

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