title: A pyrazine bis-adduct of a binuclear rhodium(II) carboxylate containing 3,4,5-triethoxybenzoate as the equatorial ligand.
abstract: The title compound, tetrakis(mu-3,4,5-triethoxybenzoato-kappa(2)O:O')bis[(pyrazine-kappa N)rhodium(II)](Rh[bond]Rh), [Rh(2)(C(13)H(17)O(5))(4)(C(4)H(4)N(2))(2)], crystallizes on an inversion centre in the triclinic space group P1. The equatorial carboxylate ligands bridge the two Rh(II) atoms, giving a binuclear lantern-like structure. The pyrazine molecules occupy the two axial coordination sites. The phenyl rings are tilted by ca 10 degrees with respect to the attached carboxylate groups. The pyrazine planes have a torsion angle of ca 19 degrees around the Rh-N bond with respect to the plane of the nearer carboxylate group and are not coplanar with the Rh[bond]Rh bond.
authors.affiliation: INQUIMAE, DQIAyQF, FCEyN, Universidad de Buenos Aires, Pab. II, Ciudad Universitaria, (C1428EHA) Buenos Aires, Argentina.
authors.forename: Maria Ana
authors.initials: MA
authors.lastname: Castro
authors.forename: Zulema D
authors.initials: ZD
authors.lastname: Chaia
authors.forename: Oscar E
authors.initials: OE
authors.lastname: Piro
authors.forename: Fabio D
authors.initials: FD
authors.lastname: Cukiernik
authors.forename: Eduardo E
authors.initials: EE
authors.lastname: Castellano
authors.forename: Marcia
authors.initials: M
authors.lastname: Rusjan