Low-temperature phase transition in glycine–glutaric acid co-crystals studied by single-crystal X-ray diffraction, Raman spectroscopy and differential scanning calorimetry

Zakharov, B.A.; Losev, E.A.; Kolesov, B.A.; Drebushchak, V.A.; Boldyreva, E.V.

doi:10.1107/S0108768112015972

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

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Figure 6
Changes in the donor–acceptor distances in the O—H⋯O (a) and N—H⋯O (b) hydrogen bonds in a glutaric acid–glycine co-crystal on cooling. Numbering of bonds for (a): (1) O4—H4⋯O1 ( $[-x, {1\over 2}+y, {1\over 2}-z]$ ), (2) O14—H14⋯O21 (1+x, -1+y, z), (3) O24—H24⋯O11 (-1+x, y, z), (4) O6—H6⋯O2 (1-x, 1-y, -z), (5) O16—H16⋯O12 (1-x, 1-y, 2-z), (6) O26—H26⋯O22 (1-x, 2-y, 1-z). Numbering of bonds for (b): (1) N1—H1A⋯O5, (2) N11—H11A⋯O15, (3) N21—H21A⋯O25, (4) N1—H1B⋯O3 ( $[1-x, -{1\over 2}+y, {1\over 2}-z]$ ), (5) N11—H11B⋯O23 (1-x, 1-y, 1-z), (6) N21—H21B⋯O13 (1-x, 1-y, 2-z), (7) N1—H1C⋯O3 ( $[x, {3\over 2}-y, {1\over 2}+z]$ ), (8) N11—H11C⋯O23, (9) N21—H21C⋯O13 (x, 1+y, z). Error bars for N⋯O distances do not exceed symbol size.

STRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS

ISSN: 2052-5206

Volume 68| Part 3| May 2012| Pages 287-296

doi:10.1107/S0108768112015972

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