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Figure 5
Sections of area 6×6 Å2 of dynamic deformation densities [see (4)[link]], showing hydrogen bonds of the type C—H⋯O. (a) The plane containing the atoms C9a—H9a—O2c of the L-phenylalanine formic acid complex. [\Delta\rho_{\rm min/max}] = −0.13/0.42 e Å-3. Properties of the hydrogen bond C9a—H9a⋯O2c are: d(H⋯O) = 2.36 Å, [\rho({\rm BCP})] = 0.111 e Å-3 and [\nabla^{2}\rho({\rm BCP})] = 0.91 e Å-5. (b) The plane containing the points H1—BCP—O1 of Ala–Tyr–Ala with ethanol. [\Delta\rho_{\rm min/max}] = −0.15/0.43 e Å-3. Properties of the hydrogen bond C1—H1⋯O1 are: d(H⋯O) = 2.19 Å, [\rho({\rm BCP})] = 0.150 e Å-3 and [\nabla^{2}\rho({\rm BCP})] = −0.25 e Å-5. Crosses indicate BCPs, contour intervals at 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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