Please use this identifier to cite or link to this item: https://doi.org/10.1021/cg0498812
Title: A new polymorph of 4-pyridinethione containing a helical assembly based on N-H⋯S hydrogen bonds
Authors: Muthu, S.
Vittal, J.J. 
Issue Date: Nov-2004
Source: Muthu, S., Vittal, J.J. (2004-11). A new polymorph of 4-pyridinethione containing a helical assembly based on N-H⋯S hydrogen bonds. Crystal Growth and Design 4 (6) : 1181-1184. ScholarBank@NUS Repository. https://doi.org/10.1021/cg0498812
Abstract: Tautomerization of 4-mercaptopyridine in absolute ethanol at two different temperatures leads to the formation of two polymorphs. In the polymorph 1, obtained by refluxing the ethanolic solution of 4-mercaptopyridine and layering with ether, the molecules are arranged in a helical conformation through N-H⋯S hydrogen bonds. On the other hand, the previously reported polymorph 2 is an N-H⋯S bonded zigzag chain and can be prepared by layering an ethanolic solution of 4-pyridinethione with ether at 5°C. Apart from the different structural motifs, N-H⋯S, C-H⋯S hydrogen bonds, π⋯π and C-H⋯π interactions make a significant difference between the two structures. Both polymorphs exhibit solid-state photoluminescence due to π-π* transition.
Source Title: Crystal Growth and Design
URI: http://scholarbank.nus.edu.sg/handle/10635/75451
ISSN: 15287483
DOI: 10.1021/cg0498812
Appears in Collections:Staff Publications

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