1-Carboxymethyl-1′-carboxylatomethyl-3,3′-[p-phenylenebis(oxymethylene)]dipyridinium bromide dihydrate
oleh: Wei-Cheng Pan, Hong-Lei Lian
| Format: | Article |
|---|---|
| Diterbitkan: | International Union of Crystallography 2010-10-01 |
Deskripsi
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.