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Issue 11, 2010
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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

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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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Publication details

The article was received on 29 Mar 2010, accepted on 04 Jul 2010 and first published on 03 Aug 2010


Article type: Communication
DOI: 10.1039/C0CE00041H
Citation: 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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