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The Weak Hydrogen BondIn Structural Chemistry and Biology$
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Gautam Desiraju and Thomas Steiner

Print publication date: 2001

Print ISBN-13: 9780198509707

Published to Oxford Scholarship Online: January 2010

DOI: 10.1093/acprof:oso/9780198509707.001.0001

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Archetypes of the weak hydrogen bond -C−H⋯O and C – H⋯N interactions in organic and organometallic systems

Archetypes of the weak hydrogen bond -C−H⋯O and C – H⋯N interactions in organic and organometallic systems

Chapter:
(p.29) 2 Archetypes of the weak hydrogen bond -C−H⋯O and C – H⋯N interactions in organic and organometallic systems
Source:
The Weak Hydrogen Bond
Author(s):

GAUTAM R. DESIRAJU

THOMAS STEINER

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780198509707.003.0002

Many, if not all, attributes of the classical hydrogen bond, X-H···A, would seem to derive from the fact that X and A are electronegative elements and from the unique electronic configuration of the H atom that permits close approaches of the X and A atoms. Indeed, it is only this combination of circumstances that makes this type of association possible, thus rendering the term ‘hydrogen bond’ so appropriate. The difference between strong and weak hydrogen bonding lies in the fact that in the latter situation, one or both of the atoms X and A are of moderate electronegativity only. This chapter looks at archetypes of the weak hydrogen bond -C-H···O and C-H···N interactions in organic and organometallic systems, along with the general properties of the weak hydrogen bond, vibrational spectroscopy of the weak hydrogen bond, reduction of thermal vibrations, computatioaal studies and hydrogen bond energies, cooperativity, hardness and softness, and weak hydrogen bonds in liquids and solution.

Keywords:   electronegativity, cooperativity, organometallic systems, vibrational spectroscopy, thermal vibrations, hardness, softness

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