Please use this identifier to cite or link to this item:
|Title:||A new polymorph of 4-pyridinethione containing a helical assembly based on N-H⋯S hydrogen bonds||Authors:||Muthu, S.
|Issue Date:||Nov-2004||Citation:||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.||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|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Feb 26, 2018
WEB OF SCIENCETM
checked on Dec 26, 2018
checked on Aug 18, 2019
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.