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3,4-Dihydroxybenzoic acid acetonitrile solvate at 120 K

✍ Scribed by Mazurek, Jaroslaw ;Dova, Eva ;Helmond, Rosaline

Publisher
International Union of Crystallography
Year
2007
Tongue
English
Weight
450 KB
Volume
63
Category
Article
ISSN
1600-5368

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✦ Synopsis

The title solvate, C 7 H 6 O 4 ÁC 2 H 3 N, comprises two molecules, one acid and one solvent. The main molecules are arranged in layers by a two-dimensional hydrogen-bond network. In this way, channels are formed along the [100] axis, which are occupied by tail-to-tail solvent molecules in a manner similar to that observed previously in related structures. However, the hydrogen bond between an acetonitrile N atom and one of the hydroxyl groups is relatively normal, with an NÁ Á ÁO separation of 2.8189 (10) A ˚. The placement of the solvent molecules makes the whole structure unstable under ambient conditions. Several minutes after removing the crystal from the mother solution it became milky, which probably indicates release of the solvent from the crystal structure.

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Trimesic acid bis(N,N-di­methyl­form­amide) solvate at 150 K
✍ Dale, Sophie H. ;Elsegood, Mark R. J. 📂 Article 📅 2003 🏛 International Union of Crystallography 🌐 English ⚖ 167 KB

Single-crystal X-ray study T = 150 K Mean '(C±C) = 0.004 A Ê R factor = 0.051 wR factor = 0.134 Data-to-parameter ratio = 12.8 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.