ring closing metathesis to give bis (dipyrrinato) copper (II) and bis (dipyrrinato) zinc (II)[2]
catenates. Demetalation of the copper (II)[2] catenate with KCN/N2H4· H2O gave the
corresponding bis (dipyrrin)[2] catenand. The boron difluoride complex of this bis (dipyrrin)
was obtained as the first fluorescent F-BODIPY [2] catenane.