Issue 11, 2010
From the journal:

CrystEngComm

Can a small amount of crystal solvent be overlooked or have no structural effect? Isomorphous non-stoichiometric hydrates (pseudo-polymorphs): the case of salicylaldehyde thiosemicarbazone†

Hassan Hosseini Monfared,*a   Anne-Christine Chamayou,b   Soliman Khajeha  and  Christoph Janiak*b  

* Corresponding authors

a Department of Chemistry, Zanjan University, Zanjan, Islamic Republic of Iran
E-mail: monfared@znu.ac.ir

b Institut für Anorganische und Analytische Chemie, Universität Freiburg, Albertstr. 21, Freiburg, Germany
E-mail: janiak@uni-freiburg.de

Abstract

Compound (E)-2-(2-hydroxybenzylidene)hydrazinecarbothioamide (salicylaldehyde thiosemicarbazone) (1) is discussed as an isomorphous non-stoichiometric hydrate, that is, while the relative amount of the water guest molecules varies all the crystal structures are “nearly the same” and all the molecular structures of 1 are “the same”. Compound 1 can crystallize isomorphous with no and different non-stoichiometric small amounts of crystal water (0.095, 0.17 and 0.20H2O per formula unit were found). Unit cell dimensions and the crystal packing of the molecules with their hydrogen bonding are virtually unaffected by the presence or absence of the crystal water.

Graphical abstract: Can a small amount of crystal solvent be overlooked or have no structural effect? Isomorphous non-stoichiometric hydrates (pseudo-polymorphs): the case of salicylaldehyde thiosemicarbazone

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Article information

DOI
https://doi.org/10.1039/C0CE00041H
Article type
Communication
Submitted
29 Mar 2010
Accepted
04 Jul 2010
First published
03 Aug 2010

CrystEngComm, 2010,12, 3526-3530

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Can a small amount of crystal solvent be overlooked or have no structural effect? Isomorphous non-stoichiometric hydrates (pseudo-polymorphs): the case of salicylaldehyde thiosemicarbazone

H. H. Monfared, A. Chamayou, S. Khajeh and C. Janiak, CrystEngComm, 2010, 12, 3526 DOI: 10.1039/C0CE00041H

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