Unnatural oligomers with discrete and predictable folding propensities (“foldamers”) are subjects of considerable current interest. 1 Attention in our laboratory and several others has focused on oligomers of β-amino acids (“β-peptides”). 1-3 We have shown, for example, that oligomers of trans-2-aminocyclohexanecarboxylic acid (ACHC) adopt a helical conformation that has approximately three residues per turn and contains a network of 14-membered ...