On the basics of carbohydrate-metal chemistry: complexes of palladium(II) with hydroxyaldehyde and -ketone hydrates.
In this work, we present novel complexes of hydroxyaldehydes and ketones with palladium(II). The compounds are studied by two-dimensional NMR spectroscopy in solution (COSY, HMQC, HMBC). Glycolaldehyde, d-glyceraldehyde, glyoxal and 2,4-O-ethylidene-d-erythrose were used as aldehydes, d-erythrulose was used as an alpha-hydroxyketone. Although different species are present in solution, only the hydrated forms of the aldehydes can coordinate to the metal centre. These complexes are stable at 4 degrees C in aqueous solution. The crystal structure of a complex formed by mesoxalic acid and palladium(II) is reported and shows coordination by both hydroxy groups of the hydrated ketone.
Allscher
Thorsten
T
Department of Chemistry and Biochemistry, Ludwig Maximilian University Munich, Butenandtstr. 5-13, D-81377 Munich, Germany.
Klüfers
Peter
P
Labisch
Oliver
O
D000079:Acetaldehyde / Q000031:analogs & derivatives / Q000737:chemistry; D000447:Aldehydes / Q000737:chemistry*; D018360:Crystallography, X-Ray; D005985:Glyceraldehyde / Q000737:chemistry; D006037:Glyoxal / Q000737:chemistry; D007659:Ketones / Q000737:chemistry*; D019906:Nuclear Magnetic Resonance, Biomolecular; D009942:Organometallic Compounds / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry*; D013780:Tetroses / Q000737:chemistry
D000447:Aldehydes; D007659:Ketones; D009942:Organometallic Compounds; D013780:Tetroses; D005985:Glyceraldehyde; D006037:Glyoxal; D010165:Palladium; D000079:Acetaldehyde; C010972:glycolaldehyde; C073321:erythrose