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The reaction of equimolar quantities of trans -[ReOCl 3 (PPh 3 ) 2 ] and 8-hydroxyquinoline (Hhqn) in benzene led to the isolation of the six-coordinate complex [ReOCl 2 (hqn)(PPh 3 )] ( 1 ). With 2-pyridine-ethanol (Hhep) the compound [ReOCl 2 (hep)(PPh 3 )] ( 2 ) was obtained. Both hqn and hep ligands act as monoanionic bidentate N , O -donor chelates. Although the two complexes are very similar, there are some significant differences in certain bond distances and angles in them. Both complexes contain the nearly linear trans O=Re–O axis, with this angle equal to 160.9(2)° and 167.8(1)° in 1 and 2 , respectively. [ABSTRACT FROM AUTHOR]

The neutral, mononuclear complex [ReO(mta) 2 Cl] (1) [Hmta  =  2-(methylmercapto)aniline] was prepared by reaction of trans -[ReOCl 3 (PPh 3 ) 2 ] with a twofold molar excess of Hmta in methanol. The oxo-bridged dimer (μ-O)[ReO(mta) 2 ] 2 (2) was synthesized by reacting [ReOCl 3 (PPh 3 ) 2 ] with a twofold excess of Hmta in a 9  :  1 acetone/water mixture. The compounds were characterized by spectroscopy and complex 1 also by X-ray crystallography. Complex 1 has a distorted octahedral geometry with the chloride coordinated trans to the oxo group, and with the chelating ligands in the equatorial plane in a cis-N cis-S configuration. [ABSTRACT FROM AUTHOR]

The complex [ReOI 2 (ame)(PPh 3 )] (Hame=2-(2-aminophenyl)ethanol) was prepared from trans -[ReOI 2 (OEt) (PPh 3 ) 2 ] and Hame in benzene. It contains an unusually long Re=O bond (1.717(5) Å) and a large trans O=Re-O (ethanolate) bond angle of 171.4(2)°. [ABSTRACT FROM AUTHOR]

The complex [Re(ddcat) 3 ] (H 2 ddcat = 3,5-di- tert -butylcatechol) was prepared by the reaction of either cis -[Re V O 2 I(PPh 3 ) 2 ] or ( n -Bu 4 N)[Re V OCl 4 ] with H 2 ddcat in toluene in air. X-ray structure determination of the product unequivocally illustrates that the bidentate chelates are in the catecholato rather than the semiquinone form and that the metal has a formal oxidation state of +VI. [ABSTRACT FROM AUTHOR]