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NMR detection of intermolecular NH×××OP hydrogen bonds between guanidinium protons and bisposphonate moieties in an artificial arginine receptor

Gschwind, R. M. ; Armbrüster, M. ; Zubrzycki, I. Z.



Abstract

Hydrogen bonding plays a major role in the selective recognition of guanidinium groups by receptor molecules. The present NMR investigation provides direct experimental evidence of hydrogen bonds in an artificial arginine receptor complex consisting of α-N-benzoylarginine ethyl ester and a bisphosphonate tweezers molecule. trans-Hydrogen bond 2hJHP couplings between the phosphonate moieties and ...

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