biostudies-literatureCurland SHarold Perlman FamilyIsraeli Science FoundationMinerva Foundation776-779https://www.ebi.ac.uk/biostudies/studies/S-EPMC6002834biostudies-literatureUnknown74(Pt 6)A new polymorph of (2<i>S</i>,3<i>S</i>)-2-amino-3-methyl-penta-noic acid, l-isoleucine C₆H₁₃NO₂, crystallizes in the monoclinic space group <i>P</i>2₁ with four independent mol-ecules in the asymmetric unit. The mol-ecules are <i>zwitterions</i>. In the crystal, N-H⋯O hydrogen bonds link two pairs of independent mol-ecules and their symmetry-related counterparts to form two types of layers stacked in an <i>anti-parallel</i> manner parallel to (001). The hydro-phobic aliphatic isopropyl groups protrude from these layers.Acta crystallographica. Section E, Crystallographic communicationsCrystal structure of a new polymorph of (2<i>S</i>,3<i>S</i>)-2-amino-3-methyl-penta-noic acid.PMC6002834546/17Curland SDiskin-Posner YMeirzadeh EfalseCrystal structure of a new polymorph of (2<i>S</i>,3<i>S</i>)-2-amino-3-methyl-penta-noic acid.A new polymorph of (2<i>S</i>,3<i>S</i>)-2-amino-3-methyl-penta-noic acid, l-isoleucine C₆H₁₃NO₂, crystallizes in the monoclinic space group <i>P</i>2₁ with four independent mol-ecules in the asymmetric unit. The mol-ecules are <i>zwitterions</i>. In the crystal, N-H⋯O hydrogen bonds link two pairs of independent mol-ecules and their symmetry-related counterparts to form two types of layers stacked in an <i>anti-parallel</i> manner parallel to (001). The hydro-phobic aliphatic isopropyl groups protrude from these layers.2018-01-01T00:00:00Z2018 Jun2026-07-08T03:17:35.453Z2019-03-26T23:43:33ZS-EPMC60028342995122810.1107/S2056989018006126