Rj. Geue et al., A NEW TEMPLATE ENCAPSULATION STRATEGY FOR LARGER CAVITY METAL-ION CAGES, Journal of the Chemical Society, Chemical Communications, (12), 1994, pp. 1513-1515
Stereospecific sequential condensation of paraformaldehyde and propion
aldehyde with a tripodal bis(triamine)cobalt(III) template rapidly enc
apsulates the metal, and a subsequent facile reduction of imine functi
ons gives an expanded cavity hexaazabicyclic cage system with unusual
structural and chromophore electron properties, complemented by an exc
eptional stability and relatively fast Co-II/III electron exchange rat
es.