The crystal of the Leu‐enkephalin raceinate (L‐Tyr‐Gly‐Gly‐L‐Phe‐L‐Leu and d‐Tyr‐Gly‐Gly‐D‐Phe‐D‐Leu) was obtained as a centrosymmetric space group. Crystal data: C28H37N5O7· 1.5H2O, Mw, = 582.6, triclinic, space group PI, a = 11.176(3), b = 16.115(3), c = 10.204(4) Å, α= 92.41(3), β= 104.86(2), γ= 85.35(2) °, V= 1770(1) Å3, Z= 2; F(000) = 640, μ(CuKα) = 6.50 cm−1, Dx= 1.081 g cm−3. The structure was determined by X‐ray diffraction. The conformation of the Leu‐enkephalin racemate was classified into the extended form which has been often observed in natural enkephalin. The symmetry‐related molecules were connected by hydrogen bonds and arranged in an antiparallel fashion. The molecular packing showed a sheet structure similar to that of natural enkephalin.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.