Issue 1, 2017

Comment on “1,4-Diazabicyclo[2.2.2]octane-based disalts showing non-centrosymmetric structures and phase transition behaviors” by X.-B. Han, P. Hu, C. Shi and W. Zhang, CrystEngComm, 2016, 18, 1563

Abstract

This Letter is in response to a paper by Han et al. (CrystEngComm, 2016, 18, 1563–1569) on the structures and isostructural phase transitions in (dabcoH2)(BF4)2·H2O and (dabcoH2)(ClO4)2·H2O. It is shown that the phase transitions in these compounds have a second-order character and their low-temperature phases exhibit ferroelastic properties. Thus, the transitions cannot be isostructural. The redeterminations of both crystal structures as a function of temperature evidence that at the transition points the symmetry is reduced from orthorhombic to triclinic.

Graphical abstract: Comment on “1,4-Diazabicyclo[2.2.2]octane-based disalts showing non-centrosymmetric structures and phase transition behaviors” by X.-B. Han, P. Hu, C. Shi and W. Zhang, CrystEngComm, 2016, 18, 1563

Associated articles

Supplementary files

Article information

Article type
Letter
Submitted
30 Jun 2016
Accepted
23 Nov 2016
First published
08 Dec 2016

CrystEngComm, 2017,19, 179-182

Comment on “1,4-Diazabicyclo[2.2.2]octane-based disalts showing non-centrosymmetric structures and phase transition behaviors” by X.-B. Han, P. Hu, C. Shi and W. Zhang, CrystEngComm, 2016, 18, 1563

M. Szafrański, CrystEngComm, 2017, 19, 179 DOI: 10.1039/C6CE01469K

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