Transition-metal-saccharide chemistry: synthesis and characterisation of D-galactose, D-fructose, D-glucose, D-xylose, D-ribose, and maltose complexes of Mn(II)

✍ Scribed by Rajiv P. Bandwar; Chebrolu P. Rao

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 583 KB
• Volume: 287
• Category: Article
• ISSN: 0008-6215
• DOI: 10.1016/0008-6215(96)00074-2

✦ Synopsis

Monosaccharide (D-Gal, D-Fru, D-Glc, D-Xyl, D-Rib) and disaccharide (D-Mal) complexes of Mn(II) were synthesised from non-aqueous solutions using [NEt4]E[MnC1EBr 2 ] and MnCI 2 • 4H20. The isolated and purified complexes were characterised by diffuse reflectance, FTIR, EPR, DTA, TGA, magnetic susceptibility, and cyclic voltammetry techniques. Synthesis from [NEt4]2[MnCleBr 2] yielded dimeric complexes 1-3 and 9, and from MnC12 • 4H20 it yielded trimeric complexes 4-8. These water-soluble complexes were found to be anionic with a Mn-to-saccharide ratio of l:l for monosaccharide complexes 1-8 and 2:1 for disaccharide complex 9. The complexes were found to be hydrolytically stable in solution at higher concentrations (>_ 4 mM), as studied by cyclic voltammetry.