Lf. Phillips, NONCONSERVATION OF SPIN IN THE REACTION OF CN WITH O-2, The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory, 102(1), 1998, pp. 31-34
Violation of spin conservation is likely to be a normal occurrence for
reactions that satisfy the following criteria: (1) the reaction rate
is limited by the rate of capture over a long-range centrifugal barrie
r in an attractive potential; (2) product formation is the result of f
ast rearrangement of a bound collision complex; and (3) attractive sho
rt-range potentials exist for more than one spin state of the complex.
An analogy exists between the time evolution of the system during a r
eaction of this type and the optical phenomenon of quantum beats. Taki
ng failure of spin-conservation into account removes some of the probl
ems encountered in a previous calculation of the rate constant for rea
ction of CN with O-2 at very low temperatures. Problems encountered at
very high temperatures suggest that this reaction system is too small
for the decay of the NCOO complex to be treated statistically.