Issue 20, 2012

Negative linear compression and expanding NH⋯N bonds in an imidazoline compound

Abstract

The 3-dimensional network of NH⋯N hydrogen bonds and Cl⋯Cl hydrogen contacts in the crystal structure of 2-(3′-chlorophenyl)imidazoline exhibits an anomalous hydrostatic compression. The lengthening of hydrogen bonds NH⋯N and some CH⋯N contacts as well as their supramolecular architecture lead to anomalous expansion of the crystal along [x] and [y] on increasing pressure to 0.1 GPa. The mechanism of this phenomenon is due to the ‘stiffness’ of the NH⋯N and Cl⋯Cl interactions and ‘softness’ of other van der Waals contacts. Above 0.1 GPa all crystal directions become compressed. However, up to 1.20 GPa, the crystal remains in the same orthorhombic phase of polar space group Fdd2.

Graphical abstract: Negative linear compression and expanding NH⋯N bonds in an imidazoline compound

Supplementary files

Article information

Article type
Paper
Submitted
05 Apr 2012
Accepted
06 Jul 2012
First published
06 Jul 2012

CrystEngComm, 2012,14, 6424-6427

Negative linear compression and expanding NH⋯N bonds in an imidazoline compound

M. Anioła, A. Katrusiak and R. Kia, CrystEngComm, 2012, 14, 6424 DOI: 10.1039/C2CE25507C

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