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Figure 3
Sections of area 6×6 Å2 of dynamic deformation densities [see (4)[link]] showing hydrogen bonds of the type O—H⋯O. (a) The plane containing the atoms O2b—H2b—O2a of the L-phenylalanine formic acid complex. [\Delta\rho_{\rm min/max}] = −0.15/0.46 e Å-3. This is a different plane containing the same hydrogen bond as displayed in Fig. 1[link](a). (b) The plane containing the atoms O5—H15—O6 of Ala–Tyr–Ala with ethanol. [\Delta\rho_{\rm min/max}] = −0.12/0.37 e Å-3. Properties of the hydrogen bond O5—H15⋯O6: d(H⋯O) = 1.67 Å, [\rho({\rm BCP})] = 0.435 e Å-3 and [\nabla^{2}\rho({\rm BCP})] = 2.05 e Å-5. Crosses indicate BCPs; contour interval: 0.05 e Å-3; contour lines as defined in Fig. 1[link].

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 65| Part 5| August 2009| Pages 624-638
doi:10.1107/S0108768109026767
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