Sugar hydrazone-metal complexes: transition- and non-transition metal complexes of monosaccharide S-alkylhydrazonecarbodithioates and dehydro-L-ascorbic acid bis(S-alkylhydrazonecarbodithioates).
Copper(II), nickel(II) and palladium(II) complexes with aldehydo-D-arabinose-, L-arabinose-, D-galactose-, D-glucose- and D-mannose- S-methyl- and S-benzylhydrazonecarbodithioates were synthesized and characterized by elemental analyses, infrared and UV-Vis. In these complexes the aldehydo sugar hydrazone acts as a mononegative NS bidentate ligand. The reaction of Cu(II) chloride, however, proceeded with reduction, and copper(I) complexes were isolated. The hydrazone molecule in these Cu(I) complexes acts as neutral NS bidentate ligand. Dehydro-L-ascorbic acid bis(S-methylhydrazinecarbodithioate) and bis(hydrazinecarbothioamide), as well as their corresponding Cu(II), Ni(II), zinc(II) and Pd(II) complexes were prepared and characterized. Electrospray (ES) and field desorption (FD) mass spectra suggest that the Cu(II), Ni(II), and Pd(II) complexes are monomeric (square planar), whereas the Zn(II) are dimeric and pentacoordinate.
Department of Chemistry, Faculty of Science, Alexandria University, PO Box 426, Ibrahimia, Alexandria 21321, Egypt. m.iskander@link.net
Magdi F
MF
Iskander
Mohamed A E
MA
Shaban
Susan M
SM
El-Badry
D000447:Aldehydes / Q000737:chemistry; D000478:Alkylation; D003683:Dehydroascorbic Acid / Q000737:chemistry*; D006835:Hydrazones / Q000737:chemistry*; D019216:Metals, Heavy / Q000737:chemistry*; D015394:Molecular Structure; D009005:Monosaccharides / Q000737:chemistry*; D013053:Spectrophotometry; D044366:Transition Temperature
D000447:Aldehydes; D006835:Hydrazones; D019216:Metals, Heavy; D009005:Monosaccharides; D003683:Dehydroascorbic Acid