title: Synthesis, characterization and the first crystal structure of the Zn(II) complex of 4,6-O-ethylidine-N-(2-hydroxybenzylidene)-beta-D-glucopyranosylamine.
abstract: 4,6-O-Ethylidine-N-(2-hydroxybenzylidene)-beta-D-glucopyranosylamine (H(3)L(1)) and N-(5-bromo-2-hydroxybenzylidene-4,6-O-ethylidine-beta-D-glucopyranosylamine (H(3)L(2)) molecules possessing a single bond C-1 single bond N double bond C(H) single bond moiety for metal-ion binding were synthesized by condensing the 4,6-O-ethylidene-beta-D-glucopyranosylamine with salicylaldehyde or 5-bromosalicylaldehyde. Complexes of these ligands with Zn(II) were isolated and characterized using elemental analysis, FTIR, UV-Vis absorption, NMR spectroscopic and FAB mass spectrometric techniques. The structure of the Zn(II) complex derived from H(3)L(1) was established for the first time by a single-crystal X-ray diffraction study. The anomeric nature of the saccharide moiety was established based on (1)H NMR studies and was confirmed by the crystal structure. Further, the structure and binding aspects of the ligand, and the coordination features of this in its Zn(II) complex were derived from the corresponding crystal structure.
authors.affiliation: Bioinorganic laboratory, Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India.
authors.forename: A K
authors.initials: AK
authors.lastname: Sah
authors.forename: C P
authors.initials: CP
authors.lastname: Rao
authors.forename: E K
authors.initials: EK
authors.lastname: Wegelius
authors.forename: E
authors.initials: E
authors.lastname: Kolehmainen
authors.forename: K
authors.initials: K
authors.lastname: Rissanen
mesh_terms: D018360:Crystallography, X-Ray; D005944:Glucosamine / Q000031:analogs & derivatives / Q000138:chemical synthesis* / Q000737:chemistry*; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet; D015032:Zinc / Q000737:chemistry*
chemical_list: C449504:4,6-O-Ethylidine-N-(2-hydroxybenzylidene)-glucopyranosylamine (H(3)L(1)); D008024:Ligands; D009942:Organometallic Compounds; D015032:Zinc; D005944:Glucosamine