R. Rudert et al., N-BUTYL(CARBOXYMETHYL)DIMETHYLAMMONINM BROMIDE AND (CARBOXYMETHYL)ETHYLDIMETHYLAMMONIUM BROMIDE, Acta crystallographica. Section C, Crystal structure communications, 52, 1996, pp. 648-652
The title compounds, C6H14NO2+.BR(-) and C8H18NO2+.-Br-, each crystall
ize forming three-dimensional networks of Br-... N+ contacts and Br-..
. H-O hydrogen bonds. n-Butyl(carboxy methyl)dimethylammonium bromide
has two molecules in the asymmetric unit. The orientation of the alkyl
chain relative to the polar part of the molecule is different in the
two compounds.