organic compounds Acta Crystallographica Section E Structure Reports Online ISSN 1600-5368 Isovaline monohydrate Ray J. Butcher,a* Greg Brewer,b Aaron S. Burtonc and Experimental d Jason P. Dworkin Crystal data ˚ 3 C5H11NO2ÁH2O V = 736.10 (12) A aDepartment of Chemistry, Howard University, 525 College Street NW, Washington, Mr = 135.16 Z =4 DC 20059, USA, bDepartment of Chemistry, Catholic University of America, Orthorhombic, P212121 Cu K radiation Washington, DC 20064, USA, cNASA Johnson Space Center, Astromaterial and a = 5.9089 (5) A˚ = 0.84 mmÀ1 Exploration Science Directorate, Houston, TX 77058, USA, and dSolar System b = 10.4444 (10) A˚ T = 123 K Exploration Division, NASA Goddard Space Flight Center, Greenbelt, MD 20771, c = 11.9274 (11) A˚ 0.48 Â 0.08 Â 0.06 mm USA Correspondence e-mail:
[email protected] Data collection Agilent Xcalibur (Ruby, Gemini) 1662 measured reflections Received 23 October 2013; accepted 20 November 2013 diffractometer 1204 independent reflections Absorption correction: multi-scan 1072 reflections with I >2(I) (CrysAlis PRO; Agilent, 2012) Rint = 0.072 ˚ Key indicators: single-crystal X-ray study; T = 123 K; mean (C–C) = 0.005 A; Tmin = 0.383, Tmax = 1.000 R factor = 0.056; wR factor = 0.162; data-to-parameter ratio = 13.2. Refinement R[F 2 >2(F 2)] = 0.056 H atoms treated by a mixture of The title compound, C5H11NO2ÁH2O, is an isomer of the - wR(F 2) = 0.162 independent and constrained amino acid valine that crystallizes from water in its zwitterion S = 1.11 refinement ˚ À3 form as a monohydrate.