Syntheses and structures of magnesium pyridine thiolates--model compounds for magnesium binding in photosystem I.
Novel magnesium pyridine-2-thiolates were prepared by using alkane elimination chemistry. The resulting complexes display a metal coordination environment composed of sulfur/nitrogen bonding from the intramolecularly stabilized mercaptopyridine ligand, in addition to coordination by the oxygen centers from two THF donors. The compounds are well-suited model compounds for the magnesium centers in Photosystem I, in which magnesium, situated in the central chlorophyll ligand, is bound to sulfur from a nearby methionine residue. All compounds were characterized by (1)H, (13)C NMR, and IR spectroscopy, in addition to Xray crystallography.
Sousa Pedrares
Antonio
A
Departamento de Quimica Inorgánica, Universidad de Santiago de Compostela, 15705 Santiago de Compostela, Spain.
Teng
Weijie
W
Ruhlandt-Senge
Karin
K