Answers are grounded in this paper and cite their sources.
Lanthanide ions act as templates for self-assembly of ligand 1 to give the triple-stranded helicate 2. Treating 2 with bromine and then water gives the nonadentate tripodal receptor 3. In the absence of LnIII ions, only 20 % of the desired receptor (fac isomer) is obtained as a mixture with the mer isomer.
No takes yet. Share an insight, caveat, or question.
Rigault et al. (1998) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: