L-Asparagine

Abstract

Crystals of anhydrous l-aspargine, C4H8N2O3, were obtained from a saturated aqueous solution. The mol­ecules are in their zwitterionic form. Although the carboxyl group is deprotonated, the distances of the two C&z-pdbond;O bonds are significantly different [1.2407 (19) and 1.262 (2) Å], due to different hydrogen-bond environments. The conformation of the side chain is trans, which distinguishes it significantly from that of l-asparagine monohydrate.