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Synthesis of ReI tricarbonyl complexes with various sulfur- and oxygen-donating ligands: Crystal structures of two ReI dinuclear structures bridged by S atoms
The synthesis and characterization of two dinuclear complexes, namely fachexacarbonyl- 1kappa3C,2kappa3C-(pyridine-1kappaN)[mu-2,2?-sulfanediyldi(ethanethiolato)- 1kappa2S1,S3:2kappa3S1,S2,S3]dirhenium(I), [Re2(C4H8S3)(C5H5N)(CO)6], (1), and tetraethylammonium fac-tris(mu-2-methoxybenzenethiolato-kappa2S:S)bis[tricarbonylrhenium(I)], (C8H20N)[Re2(C7H7OS)3(CO)6], (2), together with two mononuclear complexes, namely (2,2?-bithiophene-5-carboxylic acid-kappa2S,S?)bromidotricarbonylrhenium(I), (3), and bromidotricarbonyl(methyl benzo[b]thiophene- 2-carboxylate-kappa2O,S)rhenium(I), (4), are reported. Crystals of (1) and (2) were characterized by X-ray diffraction. The crystal structure of (1) revealed two Re?S?Re bridges. The thioether S atom only bonds to one of the ReI metal centres, while the geometry of the second ReI metal centre is completed by a pyridine ligand. The structure of (2) is characterized by three S-atom bridges and an Re ¡¤ ¡¤ ¡¤Re nonbonding distance of 3.4879 (5) A, which is shorter than the distance found for (1) [3.7996 (6)/3.7963 (6) A], but still clearly a nonbonding distance. Complex (1) is stabilized by six intermolecular hydrogen-bond interactions and an O¡¤ ¡¤ ¡¤ O interaction, while (2) is stabilized by two intermolecular hydrogen-bond interactions and two O ¡¤ ¡¤ ¡¤ pi interactions.
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Reference£º
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem