Dihydrogen Bond
Principles, Experiments, and Applications
Chapter One
INTRODUCTION: WEAK
NONCOVALENT INTERACTIONS
The development of chemistry in the last 20 years has revealed a significant
shift of interest on the part of theoreticians and experimentalists. Earlier,
chemists' attention was concentrated on atoms and atom-atom bonds. This strategy
has been very successful in the creation of new molecules with unusual
structures and with new chemical and physical properties. However, two decades
ago, the primary objects of chemical studies become intermolecular interactions
leading to complex molecular assemblies that exhibit unusual and often unique
macro properties. This situation has dominated in all areas of modern chemical
science: from physical, organic, inorganic, and organometallic chemistry to
material science and biochemistry, and has resulted in the formulation of new
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