1-Aza-niumyl-cyclo-butane-1-carboxyl-ate monohydrate.
In the title compound, C5H9NO2·H2O, the amino acid is in the usual zwitterionic form involving the α-carboxyl-ate group. The cyclo-butane backbone of the amino acid is disordered over two conformations, with occupancies of 0.882 (7) and 0.118 (7). In the crystal, N-H⋯O and O-H⋯O hydrogen bonds link the zwitterions [with the water molecule involved as both acceptor (with the NH3 (+)) and donor (through a single carboxylate O from two different aminocyclobutane carb-oxylate moities)], resulting in a two-dimensional layered structure lying parallel to (100).
Department of Chemistry, Howard University, 525 College Street NW, Washington, DC 20059, USA.
Ray J
RJ
Butcher
Department of Chemistry, Catholic University of America, Washington, DC 20064, USA.
Greg
G
Brewer
NASA Johnson Space Center, Astromaterial and Exploration Science Directorate, Houston, TX 77058, USA.
Aaron S
AS
Burton
Solar System Exploration Division, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.
Jason P
JP
Dworkin