While trialkylamines and dialky(phenyl)amines do not react with CS2 in the
sense of an addition reaction, the analogous phosphines react smoothly.
Attempts to interpret the reaction course on the basis of semiempirical,
HF, MP2, and MP4 calculations of energy changes failed completely. To
understand why Me3P or Me2PhP react so vigorously (liquid phase, 300 K)
with CS2, CASSCF and MRSDCI calculations must be carried out.