title: Molecular Architectures Derived from Metal Ions and the Flexible 3,3'-Bipyridine Ligand: Unexpected Dimer with Hg(II).
abstract: The flexible ditopic ligand 3,3'-bipyridine (3,3'-bpy) has been reacted with a series of transition metal species (Ag(+), Hg(2+), cis-a(2)M(2+) (a = NH(3) or a(2) = en; M = Pt, Pd), trans-a(2)Pt(2+) (a = NH(3))) in an attempt to produce discrete cyclic constructs. While Ag(+) gave a polymeric structure {[Ag(3,3'-bpy)](ClO(4)) . H(2)O}(n) (1), with all other metal entities cyclic structures were formed. Interestingly, Hg(CH(3)COO)(2) produced a dinuclear complex [Hg(3,3'-bpy)(CH(3)COO)(2)](2) . 3H(2)O (2), in which the two 3,3'-bpy ligands adopt a cis-orientation of the coordinating pyridyl entities. With cis-(NH(3))(2)Pt(2+), a cyclic complex 4 was isolated in crystalline form which, according to HRMS, is a trimer. With trans-(NH(3))(2)Pt(2+), different species are formed according to (1)H NMR spectroscopy, the nature of which was not established.
authors.affiliation: Fakultät Chemie, Technische Universität Dortmund, 44221 Dortmund, Germany.
authors.forename: Anupam
authors.initials: A
authors.lastname: Khutia
authors.forename: Pablo J
authors.initials: PJ
authors.lastname: Sanz Miguel
authors.forename: Bernhard
authors.initials: B
authors.lastname: Lippert