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Organic & Biomolecular Chemistry Vol - 5 Issue - 5

Organic & Biomolecular Chemistry Vol - 5 Issue - 4

Organic & Biomolecular Chemistry Vol - 5 Issue - 3

Organic & Biomolecular Chemistry Vol -4

Organic & Biomolecular Chemistry Vol -3

Organic & Biomolecular Chemistry Vol -2

Synthesis of cyclic bis- and trismelamine derivatives and their complexation properties with barbiturates

Content Provider	Royal Society of Chemistry (RSC)
Author	Kondo, Shin-ichi Takezawa, Yoko Unno, Masafumi Yano, Yumihiko Hayashi, Tomohiro Yokoyama, Takashi Sakuno, Yuichi
Copyright Year	2007
Abstract	Cyclic bis- and trismelamine derivatives were prepared from cyanuric chloride by stepwise substitutions with appropriate amines. The complexation abilities of these melamine derivatives with barbituric acid derivatives were evaluated by UV-vis spectroscopy and 1H NMR. The structure was also confirmed by X-ray crystallography. Both the acyclic and the cyclic bismelamine derivatives formed a 1 : 1 complex via six hydrogen bonds with barbituric acid derivatives. van't Hoff analyses on the complexation of the bismelamines with the barbituric acid derivative revealed that the complexation of the cyclic bismelamine was entropically favored and enthalpically less favored process than those of the acyclic bismelamine. X-Ray crystallographic analysis and 1H NMR studies revealed that the cyclic trismelamine bound one barbituric acid derivative into the cavity via six hydrogen bonds by two melamine moieties and another barbituric acid via three hydrogen bonds by the residual melamine moiety.
Starting Page	907
Ending Page	916
Page Count	10
File Format	HTM / HTML PDF
ISSN	14770520
Volume Number	5
Issue Number	6
Journal	Organic & Biomolecular Chemistry
DOI	10.1039/b615537e
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	X-ray crystallography Ultraviolet\u2013visible spectroscopy Hoff Melamine Carboxylic acid Cyanuric chloride Nuclear magnetic resonance Hydrogen bond
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Biochemistry Physical and Theoretical Chemistry

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