Includes bibliographical references and index.

Introduction : weak noncovalent interactions -- Brief summary of hydrogen-bonded systems : definitions and general view -- Concept of dihydrogen bonding -- How to find a dihydrogen bond : experimental criteria of dihydrogen bond formation -- Intramolecular dihydrogen bonds : theory and experiment -- Intermolecular dihydrogen-bonded complexes : from groups 1A-4A to xenon dihydrogen-bonded complexes -- Intermolecular dihydrogen bonding in transition metal hydride complexes -- Correlation relationships for intermolecular dihydrogen bonds -- Perspectives on dihydrogen bonding in supramolecular chemistry and crystal engineering -- Dihydrogen bonds as intermediates in intermolecular proton transfer reactions -- General conclusions.