title: Re(V) and Re(III) complexes with sal2phen and triphenylphosphine: rearrangement, oxidation and reduction.
abstract: Reactions of Re(V), tetradentate Schiff base complexes with tertiary phosphines have previously yielded both rearranged Re(V) and reduced Re(III) complexes. To further understand this chemistry, the rigid diiminediphenol (N(2)O(2)) Schiff base ligand sal(2)phen (N,N'-o-phenylenebis(salicylaldimine)) was reacted with (n-Bu(4)N)[ReOCl(4)] to yield trans-[ReOCl(sal(2)phen)] (1). On reaction with triphenylphosphine (PPh(3)), a rearranged Re(V) product cis-[ReO(PPh(3))(sal(2)phen*)]PF(6) (2), in which one of the imines was reduced to an amine during the reaction, and the reduced Re(III) products trans-[ReCl(PPh(3))(sal(2)phen)] (4) and trans-[Re(PPh(3))(2)(sal(2)phen)](+) (5) were isolated. Reaction of sal(2)phen with [ReCl(3)(PPh(3))(2)(CH(3)CN)] resulted in the isolation of [ReCl(2)(PPh(3))(2)(salphen)] (3). The compounds were characterized using standard spectroscopic methods, elemental analyses and single crystal X-ray crystallography.
authors.affiliation: Department of Chemistry, University of Missouri-Columbia, Columbia, MO 65211, USA.
authors.forename: Stephanie Renee
authors.initials: SR
authors.lastname: Lane
authors.forename: Nebiat
authors.initials: N
authors.lastname: Sisay
authors.forename: Brett
authors.initials: B
authors.lastname: Carney
authors.forename: Shorouk
authors.initials: S
authors.lastname: Dannoon
authors.forename: Stephen
authors.initials: S
authors.lastname: Williams
authors.forename: Hendrik Petrus
authors.initials: HP
authors.lastname: Engelbrecht
authors.forename: Charles Leslie
authors.initials: CL
authors.lastname: Barnes
authors.forename: Silvia Sabine
authors.initials: SS
authors.lastname: Jurisson
mesh_terms: D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry*; D018360:Crystallography, X-Ray; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D009943:Organophosphorus Compounds / Q000737:chemistry*; D010084:Oxidation-Reduction; D019275:Radiopharmaceuticals / Q000138:chemical synthesis / Q000737:chemistry; D012211:Rhenium / Q000737:chemistry*; D012545:Schiff Bases / Q000138:chemical synthesis / Q000737:chemistry; D021241:Spectrometry, Mass, Electrospray Ionization; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D056831:Coordination Complexes; D009942:Organometallic Compounds; D009943:Organophosphorus Compounds; D019275:Radiopharmaceuticals; D012545:Schiff Bases; C061896:triphenylphosphine; D012211:Rhenium