68766-98-3

Basic information

• Product Name: sodium 5-oxo-D-prolinate
• Synonyms: sodium 5-oxo-D-prolinate;(R)-5-Oxopyrrolidine-2β-carboxylic acid sodium salt
• CAS NO: 68766-98-3
• Molecular Formula: C₅H₆NO₃*Na
• Molecular Weight: 151.09581
• EINECS: 272-165-9
• Mol File: 68766-98-3.mol
• Article Data: 1

Chemical Properties

• Melting Point: 42 °C
• Boiling Point: °Cat760mmHg
• Flash Point: °C
• Appearance: /
• Density: g/cm³
• CAS DataBase Reference: sodium 5-oxo-D-prolinate(CAS DataBase Reference)
• NIST Chemistry Reference: sodium 5-oxo-D-prolinate(68766-98-3)
• EPA Substance Registry System: sodium 5-oxo-D-prolinate(68766-98-3)

Safety Data

• Hazardous Substances Data: 68766-98-3(Hazardous Substances Data)

Usage

InChI:InChI=1/C5H7NO3.Na/c7-4-2-1-3(6-4)5(8)9;/h3H,1-2H2,(H,6,7)(H,8,9);/q;+1/p-1/t3-;/m1./s1

Upstream product

• 98-79-3 2-L-pyrrolidone-5-carboxylic acid 

Relevant articles and documents

Metal Binding by Amino Acids: Preparation and Crystal Structures of Lithium, Sodium, and Potassium Hydrogen Bis-L-pyroglutamate

Lithium, sodium and potassium bis-L-pyroglutamate , , and , respectively, have been prepared by reaction of aqueous solutions of the metal hydroxides with L-pyroglutamic acid in the molar ratio 1:2, or in methanol.Crystalline samples of the salts could be obtained by slow evaporation of solutions of the salts in methanol.In the solid state, Li(L-pGlu)(L-pGluH) adopts a chain structure with the lithium atoms arranged in double strands.Adjacent metal centers are bridged by the carboxylate groups of the L-pGlu- ligands.The L-pGluH ligands are attached to the metal centers through the amide oxygen atoms.Na(L-pGlu)(L-pGluH) forms a three-dimensional coordination polymer with two half-occupied sodium positions, one L-pGlu- and one L-GluH ligand in the asymmetric unit.The carboxyl and carboxylate groups of the L-pGluH and the L-pGlu- ligands are bridging the sodium centers, giving rise to eight-membered rings, which consist of two sodium atoms, a carboxyl and a carboxylate group.The hydrogen atoms of the carboxyl group of the L-pGluH ligands are involved in strong hydrogen bonds between a carboxyl and an adjacent carboxylate oxygen atom.K(L-pGlu)(L-pGluH) adopts a layer structure with strands of potassium atoms.The metal centers are connected through bridging carboxyl and carboxylate groups of the L-pGluH and L-pGlu- ligands, respectively.The structure features eight-membered ring units comparable to those observed for Na(L-pGlu)(L-pGluH), again with the hydrogen atom of the carboxyl group engaged in a strong transannular hydrogen bond.The amide oxygen atoms of the L-pGlu- and the L-pGluH ligands are coordinated to the metal centers of adjacent coordination chains.The results of 1H- and 13C-NMR investigations of aqueous solutions of the compounds indicate extensive electrolytic dissociation in diluted solutions. Key Words: Hydrogen bis-L-pyroglutamates, lithium, sodium, potassium / Pyroglutamate coordination and conformation