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Mechanochemical synthesis of N-salicylideneaniline: thermosalient effect of polymorphic crystals

Mittapalli, Sudhir and Perumalla, D Sravanakumar and Nangia, Ashwini (2017) Mechanochemical synthesis of N-salicylideneaniline: thermosalient effect of polymorphic crystals. In: IUCRJ, 4 . pp. 243-250.

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Official URL: http://dx.doi.org/10.1107/S2052252517004043

Abstract

Polymorphs of the dichloro derivative of N-salicylideneaniline exhibit mechanical responses such as jumping (Forms I and III) and exploding (Form II) in its three polymorphs. The molecules are connected via the amide N-H center dot center dot center dot O dimer synthon and C-Cl center dot center dot center dot O halogen bond in the three crystal structures. A fourth high-temperature Form IV was confirmed by variable-temperature single-crystal X-ray diffraction at 180 degrees C. The behaviour of jumping exhibited by the polymorphic crystals of Forms I and III is due to the layered sheet morphology and the transmission of thermal stress in a single direction, compared with the corrugated sheet structure of Form II such that heat dissipation is more isotropic causing blasting. The role of weak C-Cl center dot center dot center dot O interactions in the thermal response of molecular crystals is discussed.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the INT UNION CRYSTALLOGRAPHY, 2 ABBEY SQ, CHESTER, CH1 2HU, ENGLAND
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Depositing User: Id for Latest eprints
Date Deposited: 03 Jun 2017 09:36
Last Modified: 03 Jun 2017 09:36
URI: http://eprints.iisc.ac.in/id/eprint/57095

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