title: Characterization of ruthenium-dinitrogen tetraamine complexes by XAFS spectroscopy.
abstract: A reaction between N2 and trans-Ru(II)Cl2L (L=2,5,9,12-tetramethyl-2.5,9,12-tetraazatridecane) in aqueous solutions has been investigated by XAFS spectroscopy. Ru K-edge EXAFS clearly revealed that there exists an N2-bridged binuclear complex and that the Ru-Ru distance is 4.96 A with the coordination number of 0.5. The Ru K-edge energies of the N2 complexes are closer to that of Ru(III)Cl2L+ rather than that of Ru(II)Cl2L, indicating back donation from the Ru dpi to the N2 pi* orbitals.
authors.affiliation: Department of Chemistry, School of Science, The University of Tokyo, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Okamoto
authors.forename: T
authors.initials: T
authors.lastname: Takahashi
authors.forename: K
authors.initials: K
authors.lastname: Kohdate
authors.forename: H
authors.initials: H
authors.lastname: Kondoh
authors.forename: T
authors.initials: T
authors.lastname: Yokoyama
authors.forename: T
authors.initials: T
authors.lastname: Ohta