Steric guided anomalous thermal expansion in a dimorphic organic system

Suman Bhattacharya; Binoy K. Saha

doi:10.1039/C3CE41869C

Steric guided anomalous thermal expansion in a dimorphic organic system

Suman Bhattacharya^a and Binoy K. Saha*^a

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* Corresponding authors

^a Department of Chemistry, Pondicherry University, Pondicherry, India, 605014
E-mail: binoypu@yahoo.co.in

Abstract

The thermal expansion behaviour of two polymorphs of 4,4′-methylenebis(2,6-dimethylaniline) (MBDA) has been studied. The monoclinic form exhibits a very large uniaxial negative thermal expansion (α_l = −174(8) MK⁻¹) and 1.6 times higher α_v than the triclinic form, which exhibits a normal positive thermal expansion. This anomalous thermal expansion behaviour in the monoclinic form is guided by the steric effects of the strongly vibrating methyl groups in the solid.

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Publication details

The article was received on 16 Sep 2013, accepted on 28 Dec 2013 and first published on 06 Jan 2014

Article type: Communication

DOI: 10.1039/C3CE41869C

Citation: CrystEngComm, 2014,16, 2340-2343

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Steric guided anomalous thermal expansion in a dimorphic organic system

S. Bhattacharya and B. K. Saha, CrystEngComm, 2014, 16, 2340
DOI: 10.1039/C3CE41869C
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CrystEngComm

Steric guided anomalous thermal expansion in a dimorphic organic system

Abstract

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Publication details

Steric guided anomalous thermal expansion in a dimorphic organic system

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