Preferred Label : Rice–Ramsperger–Kassel–Marcus (RRKM) theory;
IUPAC acronym : RRKM; RRK;
IUPAC definition : An improved form of Rice–Ramsperger–Kassel (RRK) theory in which account is taken
of the way in which the various normal-mode vibrations and rotations contribute to
reaction, and allowance is made for the zero-point energies. In this theory the energy
ɛ* in an energized molecule is classified as either active, ɛ*active, or inactive,
ɛ*inactive. The rate depends upon P ɛ *active N ɛ *, where N ɛ * is the density of
states having energy between ɛ* and ɛ* dɛ*, and P ɛ *active is the sum of the active
quantum states of the activated complex. This extension of RRK theory brings it in
line with transition-state theory.;
Origin ID : R05391;
See also
An improved form of Rice–Ramsperger–Kassel (RRK) theory in which account is taken
of the way in which the various normal-mode vibrations and rotations contribute to
reaction, and allowance is made for the zero-point energies. In this theory the energy
ɛ* in an energized molecule is classified as either active, ɛ*active, or inactive,
ɛ*inactive. The rate depends upon P ɛ *active N ɛ *, where N ɛ * is the density of
states having energy between ɛ* and ɛ* dɛ*, and P ɛ *active is the sum of the active
quantum states of the activated complex. This extension of RRK theory brings it in
line with transition-state theory.
