A mediated hydrogen bond in an α-hydroxycarboxyl group: X-ray structure of (R,R)-N-methyltartramic acid monohydrate and an ab initio study of model systems

Rychlewska, U.; Szarecka, A.; Rychlewski, J.; Motała, R.

doi:10.1107/S0108768199005091

Acta Crystallographica Section B
Acta Crystallographica
Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS

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Figure 1
An illustration of the T(s,a) conformation of the MMA molecule and the atom-numbering scheme. Note the change of conformation around the C—C* bond caused by replacement of carboxyl by an amide group. Arrows indicate CO/CβH dipole–dipole interactions. Displacement ellipsoids are drawn at the 40% probability level and H atoms are drawn as spheres of arbitrary radii.

STRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS

ISSN: 2052-5206

Volume 55| Part 4| August 1999| Pages 617-625

doi:10.1107/S0108768199005091

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