PROTON-TRANSFER-DEPENDENT REVERSIBLE PHASE-CHANGES IN THE 4,4'-BIPYRIDINIUM SALT OF SQUARIC ACID

被引:88
作者
REETZ, MT [1 ]
HOGER, S [1 ]
HARMS, K [1 ]
机构
[1] UNIV MARBURG,FACHBEREICH CHEM,D-35043 MARBURG,GERMANY
来源
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH | 1994年 / 33卷 / 02期
关键词
D O I
10.1002/anie.199401811
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A color change from yellow to red is observed on heating the bipyridinium salt of squaric acid (1). This reversible process is based on a proton transfer during the phase change. According to the Bürgi–Dunitz structure‐correlation principle, the structure of the anion in solid 1 represents a point on the reaction coordinate of the deprotonation of squaric acid. (Figure Presented.) Copyright © 1994 by VCH Verlagsgesellschaft mbH, Germany
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页码:181 / 183
页数:3
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