Lel2ob and ob2lel cage complexes based on [Co(pn)3]3+(pn = propane-1,2-diamine): synthesis, resolution, and tentative identity of their fac and mer geometrical isomers

Abstract

Encapsulation of [Co(R/S-pn)₃]³⁺ affords the cobalt(III) sarcophagine(sar)-type complexes with stabilized diamine chelate ring conformations; we describe the synthesis, resolution and tentative identity of the one fac and three mer geometrical isomers of the lel₂ob cages, as well as the subsequent conversion to their ob₂lel diastereoisomers.