On photolysis of trans(t-N,S)-[Co{S(O)2CH2COO-S,O}(tren)]+ with visibl
e light, both linkage isomerization (sulfinato-S to sulfinato-O) and g
eometrical isomerization (trans to cis) took place to yield cis (t-N,O
(S)) - and trans(t-N,O(S))-[Co{OS(O)CH2COO-O,O)(tren)]+ (O(S)=oxygen o
f sulfinate group).