Jh. Yang et al., Comparison of an HXH three-center hydrogen bond with alternative two-center hydrogen bonds in a model system, ORG LETT, 1(1), 1999, pp. 11-13
Little information is available on the stability of three center hydrogen b
onds relative to two center hydrogen bonds. In an XHX three center hydrogen
bond, two donors interact with one acceptor; here, we compare an HXH inter
action with the component two center hydrogen bonds (H-X and X-H) in a smal
l depsipeptide, 1. The results show that there is negative cooperativity be
tween the two components of the HXH interaction.