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.
Departamento de Quimica Inorgánica, Universidad de Santiago de Compostela, 15705 Santiago de Compostela, Spain.
Antonio
A
Sousa Pedrares
Weijie
W
Teng
Karin
K
Ruhlandt-Senge