DL-NORLEUCINE, BETA-FORM AT 120 K

This paper forms part VI in a series of crystal structures of hydropho bic amino acids. The crystal structure of a low-temperature form (120 K) of DL-norleucine (2-aminohexanoic acid, C6H13NO2) has been solved a nd refined in the space group C2/c. The molecular packing and cell par ameters correlate very well with those proposed for the beta form of D L-norleucine as deduced by Mathieson [Acta Cryst, (1953), 6, 399-403]. Estimated standard deviations for the bonds between heavy atoms are 0 .001-0.002 Angstrom.