Figure 22.2.2.1

Baker, E. N.

doi:10.1107/97809553602060000711

International
Tables for
Crystallography
Volume F
Crystallography of biological macromolecules
Edited by M. G. Rossmann and E. Arnold

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International Tables for Crystallography (2006). Vol. F. ch. 22.2, p. 546 | 1 | 2 |

Figure 22.2.2.1

E. N. Baker^a ^*

^aSchool of Biological Sciences, University of Auckland, Private Bag 92-109, Auckland, New Zealand
Correspondence e-mail: ted.baker@auckland.ac.nz

Figure 22.2.2.1

Hydrogen-bonding configurations. (a) The standard two-centre hydrogen bond in which an H atom attached to a donor atom, D, is directed towards a lone pair of an acceptor, A. (b) A classic three-centre, or bifurcated, hydrogen bond, with a single H atom shared between the lone pairs of two acceptors. The situations shown in (c) and (d) are not true three-centre hydrogen bonds since they are essentially equivalent to that in (a).