title: Dinitrogen formation by oxidative intramolecular N---N coupling in cis,cis-[(bpy)2(NH3)RuORu(NH3)(bpy)2]4+.
abstract: The (15)N-labeled diammine(mu-oxo)ruthenium complex cis,cis-[(bpy)(2)(H(3)(15)N)Ru(III)ORu(III)((15)NH(3))(bpy)(2)](4+) ((2-(15)N)(4+)) was synthesized from cis,cis-[(bpy)(2)(H(2)O)Ru(III)ORu(III)(H(2)O)(bpy)(2)](4+) by using ((15)NH(4))(2)SO(4) and isolated as its perchlorate salt in 17% yield. A 1:1 mixture of (2-(15)N)(4+) and nonlabeled cis,cis-[(bpy)(2)(H(3)(14)N)Ru(III)ORu(III)((14)NH(3))(bpy)(2)](4+) were electrochemically oxidized in aqueous solution. The gaseous products (14)N(2) and (15)N(2) were formed in equimolar amounts with only a small amount of (14)N(15)N detected. This demonstrates that dinitrogen formation by oxidation of the diammine complex proceeds by intramolecular N---N coupling.
authors.affiliation: Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, Japan. ishitani@chem.titech.ac.jp
authors.forename: Osamu
authors.initials: O
authors.lastname: Ishitani
authors.forename: Emiko
authors.initials: E
authors.lastname: Ando
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Meyer
mesh_terms: D000588:Amines / Q000737:chemistry*; D018360:Crystallography, X-Ray; D004563:Electrochemistry; D004578:Electron Spin Resonance Spectroscopy; D008968:Molecular Conformation; D015394:Molecular Structure; D009584:Nitrogen / Q000737:chemistry*; D009587:Nitrogen Isotopes; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D010084:Oxidation-Reduction; D012428:Ruthenium / Q000737:chemistry*; D013237:Stereoisomerism; D014867:Water / Q000737:chemistry
chemical_list: D000588:Amines; D009587:Nitrogen Isotopes; D009942:Organometallic Compounds; D014867:Water; D012428:Ruthenium; D009584:Nitrogen