1-Carboxymethyl-1 #8242;-carboxylatomethyl-3,3 #8242;-[p-phenylenebis(oxymethylene)]dipyridinium bromide dihydrate

In the crystal structure of the title salt, C22H21N2O6+·Br−·2H2O, pairs of betaine molecules are bridged by protons (the bridging proton is disordered), forming strong and symmetrical O—H...O hydrogen bonds, leading to an infinite chain along the b axis. The wat...

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Bibliographic Details
Published in:Acta crystallographica. Section E, Structure reports online Structure reports online, 2010-10, Vol.66 (10), p.o2656-o2656
Main Authors: Wei-Cheng Pan, Hong-Lei Lian
Format: Article
Language:English
Online Access:Get full text
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Summary:In the crystal structure of the title salt, C22H21N2O6+·Br−·2H2O, pairs of betaine molecules are bridged by protons (the bridging proton is disordered), forming strong and symmetrical O—H...O hydrogen bonds, leading to an infinite chain along the b axis. The water molecules are linked to the betaine molecule and the bromide ion through O—H...O and O—H...Br interactions. The central ring, located on an inversion centre, makes dihedral angles of 1.2 (2)° with the outer rings. One of the carboxylic acid groups is deprotonated.
ISSN:1600-5368
1600-5368
DOI:10.1107/S1600536810037748