2-Methyl-aspartic acid monohydrate.
The title compound, C5H9NO4·H2O, is an isomer of the α-amino acid glutamic acid that crystallizes from water in its zwitterionic form as a monohydrate. It is not one of the 20 proteinogenic α-amino acids that are used in living systems and differs from the natural amino acids in that it has an α-methyl group rather than an α-H atom. In the crystal, an O-H⋯O hydrogen bond is present between the acid and water mol-ecules while extensive N-H⋯O and O-H⋯O hydrogen bonds link the components into a three-dimensional array.
Department of Chemistry, Catholic University of America, Washington, DC 20064, USA.
Greg
G
Brewer
NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.
Aaron S
AS
Burton
Solar System Exploration Division, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.
Jason P
JP
Dworkin
Department of Chemistry, Howard University, 525 College Street NW, Washington, DC 20059, USA.
Ray J
RJ
Butcher