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Room-temperature monoclinic and low-temperature triclinic phase-transition structures of meso-octamethylcalix [4] pyrrole-dimethyl sulfoxide (1/1)

Room-temperature monoclinic and low-temperature triclinic phase-transition structures of meso-octamethylcalix [4] pyrrole-dimethyl sulfoxide (1/1)
Room-temperature monoclinic and low-temperature triclinic phase-transition structures of meso-octamethylcalix [4] pyrrole-dimethyl sulfoxide (1/1)
Crystals of the title complex, C28H36N4.C2H6OS, undergo a phase transition between room temperature and 198 K, as determined by X-ray diffraction techniques. A monoclinic form is observed at room temperature, while a triclinic modification is found at 198 K, with Z' changing from 1 to 2. Differential scanning calorimetry (DSC) of the calixpyrrole- dimethyl sulfoxide complex revealed a series of phase changes between 273 and 243 K. The transition from the room-temperature monoclinic form to the low-temperature triclinic form is reversible, as determined by changes in the cell dimensions from remeasuring selected reflections at room temperature and at temperatures below 223 K. The uncomplexed calix[4]pyrrole molecule shows no phase changes occurring between room temperature and 233 K, the low-temperature limit of the DSC.
anion-binding, calixpyrroles
0108-2701
1426-1428
Lynch, Vincent M.
1ca6d39d-b02d-4141-ab55-f566f00a09b5
Gale, Phillip A.
c840b7e9-6847-4843-91af-fa0f8563d943
Sessler, Jonathan L.
d793ea76-a3a2-4ce1-a8d5-aca7d3307fbe
Madeiros, David
f8944a8f-b68d-46ca-857d-eeb51aff46f0
Lynch, Vincent M.
1ca6d39d-b02d-4141-ab55-f566f00a09b5
Gale, Phillip A.
c840b7e9-6847-4843-91af-fa0f8563d943
Sessler, Jonathan L.
d793ea76-a3a2-4ce1-a8d5-aca7d3307fbe
Madeiros, David
f8944a8f-b68d-46ca-857d-eeb51aff46f0

Lynch, Vincent M., Gale, Phillip A., Sessler, Jonathan L. and Madeiros, David (2001) Room-temperature monoclinic and low-temperature triclinic phase-transition structures of meso-octamethylcalix [4] pyrrole-dimethyl sulfoxide (1/1). Acta Crystallographica Section C: Crystal Structure Communications, 57 (12), 1426-1428. (doi:10.1107/S0108270101015931).

Record type: Article

Abstract

Crystals of the title complex, C28H36N4.C2H6OS, undergo a phase transition between room temperature and 198 K, as determined by X-ray diffraction techniques. A monoclinic form is observed at room temperature, while a triclinic modification is found at 198 K, with Z' changing from 1 to 2. Differential scanning calorimetry (DSC) of the calixpyrrole- dimethyl sulfoxide complex revealed a series of phase changes between 273 and 243 K. The transition from the room-temperature monoclinic form to the low-temperature triclinic form is reversible, as determined by changes in the cell dimensions from remeasuring selected reflections at room temperature and at temperatures below 223 K. The uncomplexed calix[4]pyrrole molecule shows no phase changes occurring between room temperature and 233 K, the low-temperature limit of the DSC.

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More information

Published date: 1 December 2001
Keywords: anion-binding, calixpyrroles

Identifiers

Local EPrints ID: 19570
URI: http://eprints.soton.ac.uk/id/eprint/19570
ISSN: 0108-2701
PURE UUID: 9c3afb93-b786-4ff0-8351-7ba2397516c0
ORCID for Phillip A. Gale: ORCID iD orcid.org/0000-0001-9751-4910

Catalogue record

Date deposited: 15 Feb 2006
Last modified: 20 Jul 2019 01:07

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