title: Molecular structures of edge-sharing square-planar dinuclear complexes with unsaturated bridges.
abstract: The dinuclear complexes of transition metal ions of type [M(2)(mu,eta(1)-XY)(2)L(4)], where XY is an unsaturated ligand that can act as a four-electron or a two-electron donor through the X atom, appear in two molecular conformations depending on whether the coordination planes around the two metal atoms are coplanar or bent. In both structures the geometry of the X atom is planar, corresponding to an sp(2) hybridization. An ab initio theoretical study on 43 representative complexes, complemented with a structural database analysis, provides a rationale for the experimentally observed structures.
authors.affiliation: Departament de Química Inorgànica and Centre de Recerca en Química Teòrica (CeRQT), Universitat de Barcelona, Diagonal 647, 08028 Barcelona, Spain. gabriel.aullon@qi.ub.es
authors.forename: G
authors.initials: G
authors.lastname: Aullón
authors.forename: S
authors.initials: S
authors.lastname: Alvarez