C7H12N 2O5, orthorhombic, P212121, a = 5·525(5), b = 12·565(4), c = 13·211(6) Å, Z = 4, Dc = l·48, Dm (flotation in chloroform/ methylene chloride) = 1·48(1) Mg m-3, R1 = 0·039, R2 = 0·040 for 1172 observations. The dipeptide crystallizes as a zwitterion with the main-chain carboxyl ionized and the amino terminus protonated. The conformation of the peptide group is trans; the glutamyl side chain is extended, but the carboxy terminus is held by hydrogen bonding in a non-extended conformation with a torsional angle ΦGly = -74.1°.
Conformation; Molecular structure
Citation: Pilot Scholars Version (Modified MLA Style)
Eggleston, Drake S.; Valente, Edward J.; and Hodgson, Derek J., "α-L-Glutamylglycine" (1981). Chemistry Faculty Publications and Presentations. Paper 17.