Classification of hydrogen bonds

Another type of classification of hydrogen bonds is based upon the relative strength of the interaction ... 

Following our general classification of hydrogen bonds, a negatively polarized hydrogen atom in H-Y, where Y is a less electronegative element than H (e.g., B, Al, Re, K, Mg, etc.), could be considered an unusual or nonconventional proton acceptor. Then the interaction... 

TABLE 1. Jeffrey s classification of hydrogen bonds [11] (see also Refe. [16, 21]). 

Keywords Hydrogen bonding definition of hydrogen bond classification of hydrogen bonding... 

Classification of hydrogen-bond motives in crystals of NH-pyrazoles 06ARK(2)15. 

Fig. 5.1 Classification of hydrogen bonding in supramolecular liquid crystal molecules a-d close t)q)e for rod and disk complexes between different molecules (a, b) and identical molecules (c, d) e-f open type for one-dimensional association through the formation of hydrogen bonded chains between identical components (e) and for molecular association by the formation of laytis linked by hydrogen bonds (f). Reproduced from Ref. [2] by permission of John Wiley Sons Ltd...

Classification of Hydrogen Bonds According to Properties of Proton Donor and Proton Acceptor... 

Table 3.2 Classification of hydrogen bonds (uncharged species). Adapted from J. C. Jeffery, An Introduction to Hydrogen Bonding, Oxford Uniwrsity Press, Oxford. 1997 22],...

NONCONVENTIONAL HYDROGEN BONDS AS A PART OF HYDROGEN-BONDED SYSTEMS DEFINITION AND CLASSIFICATION... 

In discussions of structure we must limit ourselves to the case of linear polymers, for with the branched polymers so far studied their complexity has defied analysis. Here, however, as I have discussed elsewhere [11], it is possible to draw up a rational classification of the types of structure as defined by the arrangements of hydrogen bonds taken as the main element in intra- and inter-chain linking. 

Figure 1.15 Classification of protein structure according to Levitt and Chothia.15 The protein is viewed from such an angle that most segments of secondary structure are seen end on. Each strand of a j8 sheet is represented by a square. The front end of each a helix is represented by a circle. The segments that are close in space are close together in the diagram. The segments are connected by bold or thin arrows (from the N- to the C-terminus) to indicate whether the connection is at the near or the far end. The approximate scale is diameter of a helix = 5 A j8 strand = 5 X 4 A separation of helixes = 10 A separation of hydrogen-bonded j8 strand = 5 A separation of nonhydrogen-bonded strands = 10 A.

This quantity has been used in some cases for the calculation of hydrogen bond energies [21] and their classification [22],... 

Table 1 Classification and properties of hydrogen bonds, D H A. G. R. Desiraju and T. Steiner, 1999. Adapted from Table 1.5 in The Weak Hydrogen Bond in Structural Chemistry and Biology by Gautam R. Desiraju and Thomas Steiner (1999) by permission of Oxford University Press.

Legon, A. C. and Millen, D. J., Determination of properties of hydrogen-bonded dimers by rotational spectroscopy and a classification of dimer geometries, Faraday Discuss. Chem. Soc. 73, 71-87 (1982). 

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