Crystal structures of Z-Gly-Aib-O^-·0.5Ca²⁺·H₂O and Z-Gly-Aib-OH.

ABSTRACT: Both deprotonated and neutral achiral title dipeptides assume similar structures of two conformations, which are related by a unit-cell inversion centre. Two mol-ecules of both conformations of the metal-free neutral dipeptide are linked by two hydrogen bonds, while two mol-ecules of both conformations of the ionized form coordinate a calcium ion in calcium(II) bis-[2-(2-{[(benz-yl-oxy)carbon-yl]amino}-acetamido)-2-methyl-propano-ate] monohydrate, 0.5Ca²⁺·C₁₄H₁₇N₂O₅^-·0.5H₂O, which lies on an inversion centre and forms a distorted octa-hedral complex with the metal ion. These Ca^II complexes are connected in the crystal via hydrogen bonds in the b- and c-axis directions, whereas in th

SUBMITTER: Gessmann R 

PROVIDER: S-EPMC6073005 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature