Titlebook: Hydrogen Bonding in Biological Structures; George A. Jeffrey,Wolfram Saenger Book 1991 Springer-Verlag Berlin Heidelberg 1991 DNA.Peptide.

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sense, a Rosetta stone that unlocks a wealth of information from the language of crystallography and makes it accessible to all scientists. (From a book review of Kenneth M. Harmon, Science 1992)978-3-540-57903-8978-3-642-85135-3

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of extraordinary importance; without them all wooden structures would collapse, cement would crumble, oceans would vaporize, and all living things would disintegrate into random dispersions of inert matter..Hydrogen Bonding in Biological Structures. is informative and eminently usable. It is, in a

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The Importance of Hydrogen Bondsthods of abstracting scientific papers and the use of key words, it is difficult to trace the origin of concepts. We know that before 1932, a number of chemical phenomena were observed that led investigators to postulate the existence of weak or secondary bonds involving the interactions between fun

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Theoretical Calculations of Hydrogen-Bond Geometriesrs, instead of monomers. A second reason is that the weaker attractive forces which attenuate more slowly result in a potential energy surface near the minimum, which is much shallower than for covalent bonds. Consequently, relatively small changes in energy correspond to relatively large changes in

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Effect of Hydrogen Bonding on Molecular Structuren in Part IB, Chap. 7, Table 7.2. This perturbation of the electronic structure of the donor bond and the acceptor atom will extend to the adjacent covalent bonds, depending upon the polarizability of the covalent bonding in the molecule. For this reason it is greatest in conjugated systems, where i

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The Importance of Small Molecule Structural Studiesxerting a “valence” which is generally two, but can be three, and rarely, four. There is great structural versatility, with H · · · A distances ranging from 1.2 to beyond 3 ? and X — H · · · A angles from 80° to 180°.