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Crystals 2014, 4(1), 1-10; doi:10.3390/cryst4010001
Article

Synthesis and Crystal Structures of 1,1′-Methylene-bis(imidazolidine-2,4-dione) and Alkali Metal Salts

1
, 2
, 3
, 1
, 1
, 1,*  and 1
1 Faculty of Chemistry and Pharmacy, University of Innsbruck, Innsbruck 6020, Austria 2 Institute of Mineralogy and Petrography, University of Innsbruck, Innsbruck 6020, Austria 3 Institute for Structural Engineering and Materials Science, University of Innsbruck, Innsbruck 6020, Austria
* Author to whom correspondence should be addressed.
Received: 22 October 2013 / Revised: 22 November 2013 / Accepted: 31 December 2013 / Published: 8 January 2014
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Abstract

Single-crystal structures of 1,1′-methylenebis(imidazolidine-2,4-dione) and its sodium and dipotassium salts were determined. Powder X-ray diffraction was also employed to characterize the bulk materials and those phases which did not yield single-crystals. These compounds are of interest for intumescent coatings.
Keywords: hydantoin; intumescent; potassium salt; powder X-ray diffraction; sodium salt hydantoin; intumescent; potassium salt; powder X-ray diffraction; sodium salt
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Salchner, R.; Kahlenberg, V.; Lackner, R.; Wurst, K.; Braun, D.; Laus, G.; Schottenberger, H. Synthesis and Crystal Structures of 1,1′-Methylene-bis(imidazolidine-2,4-dione) and Alkali Metal Salts. Crystals 2014, 4, 1-10.

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