Volume 115, Issue 17 pp. 2001-2004
Zuschrift

A Classical Example of a Disappearing Polymorph and the Shortest Intermolecular H⋅⋅⋅H Separation Ever Found in an Organic Crystal Structure

Petra Bombicz Dr.

Petra Bombicz Dr.

Institute of Chemistry, Chemical Research Center, Hungarian Academy of Sciences, Pusztaszeri út 59–67, PBox 17, 1525 Budapest, Hungary, Fax: (+36) 1-325-7554

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Mátyás Czugler Dr.

Mátyás Czugler Dr.

Institute of Chemistry, Chemical Research Center, Hungarian Academy of Sciences, Pusztaszeri út 59–67, PBox 17, 1525 Budapest, Hungary, Fax: (+36) 1-325-7554

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Roland Tellgren Prof. Dr.

Roland Tellgren Prof. Dr.

Department of Materials Chemistry, The Ångström Laboratory, Uppsala University, PBox 538, SE-751 21 Uppsala, Sweden

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Alajos Kálmán Prof. Dr.

Alajos Kálmán Prof. Dr.

Institute of Chemistry, Chemical Research Center, Hungarian Academy of Sciences, Pusztaszeri út 59–67, PBox 17, 1525 Budapest, Hungary, Fax: (+36) 1-325-7554

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First published: April 29, 2003
Citations: 4

The authors express their gratitude to Prof. Jack Dunitz for invaluable discussions. The authors acknowledge Dr. József Kovács, Mr. Csaba Kertész, and Dr. János Madarász (Budapest), Mr. Håkan Rundlöf and Dr. Valéry Baron (Studsvik). P.B. is indebted to the Royal Swedish Academy of Sciences for the support of her stay at the Studsvik Neutron Research Laboratory, Uppsala University.

Graphical Abstract

Taucht nur alle Jubeljahre auf: Neutronen- und Röntgenbeugungsuntersuchungen bei tiefen Temperaturen ergaben ein empfindliches Gleichgewicht zwischen anziehenden und abstoßenden intermolekularen Kräften in den beiden kristallinen Formen von 1,2,3,5-Tetra-O-acetyl-β-D-ribofuranose (zu sehen ist die weniger stabile Form; O: rot, H: blau, C: grau). Sehr kleine intermolekulare H⋅⋅⋅H-Abstände, die nur in der weniger stabilen Kristallform vorliegen, sind für deren Verschwinden maßgeblich.

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