Molecular recognition: Connection and disconnection of hydrogen bonds, a case study with dimeric and highly associated monocarboxylic acids with simple receptors
The new receptor (5) having mixed diamide moieties is a simple synthetic model which binds carboxylic acids by three point hydrogen bonds involving pyridine nitrogen, pyridine amide as well as the flexible aliphatic amide moieties. This is in contrast to the receptor (6) which makes only two point hydrogen bonds. Binding studies of the simple pyridine amide (3) making two hydrogen bonds with a number