Solid-state specific and unidirectional photoisomerization of 3-substituted propyl to 1-substituted propyl cobaloxime complexes via 2-substituted propyl complexes
Y. Ohgo et al., Solid-state specific and unidirectional photoisomerization of 3-substituted propyl to 1-substituted propyl cobaloxime complexes via 2-substituted propyl complexes, CHEM LETT, (11), 2001, pp. 1190-1191
Solid state-specific (gamma-->beta-->alpha )photoisomerization of 3-cyanopr
opyl and 3-(methoxycarbonyl)propyl cobaloxime complexes were found to occur
on visible-light irradiation. There exist considerable differences in the
reaction rates, which have no relation to the basicity of the axial ligand.
In the former series of complexes, the rate constant (k(2)) for the second
step (beta-->alpha) is much faster than that (k(1)) for the first step. Ho
wever, in the latter series of complexes, the rate constant (k(2)) for the
second step tends to decrease extremely, and thus, k(2) become smaller than
k(1).