A pyrazine bis-adduct of a binuclear rhodium(II) carboxylate containing 3,4,5-triethoxybenzoate as equatorial ligand

M. A. CASTRO; Z. D. CHAIA; O. E. PIRO; F. D. CUKIERNIK; E. E. CASTELLANO; M. RUSJAN

Acta Cryst. C

IUCr

Año: 2002 vol. 58 p. 393 - 395

The title compound, tetrakis(mu-3,4,5-triethoxybenzoato-kappa2O:O')bis[(pyrazine-kappaN)rhodium(II)](Rh-Rh), [Rh2(C13-H17O5)4(C4H4N2)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 10º with respect to the attached carboxylate groups. The pyrazine planes have a torsion angle of ca 19º around the Rh-N bond with respect to the plane of the nearer carboxylate group and are not coplanar with the Rh-Rh bond.