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Bioinorganic Chemistry and Applications
Volume 2010, Article ID 169054, 8 pages
http://dx.doi.org/10.1155/2010/169054
Research Article

Molecular Architectures Derived from Metal Ions and the Flexible 3,3-Bipyridine Ligand: Unexpected Dimer with Hg(II)

Fakultät Chemie, Technische Universität Dortmund, 44221 Dortmund, Germany

Received 4 March 2010; Accepted 12 March 2010

Academic Editor: Spyros Perlepes

Copyright © 2010 Anupam Khutia et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The flexible ditopic ligand 3, 3 -bipyridine (3, 3 -bpy) has been reacted with a series of transition metal species (A g + , H g 2 + , cis- a 2 M 2 + ( a = N H 3 or a 2 = e n ; M = P t , P d ), trans- a 2 P t 2 + ( a = N H 3 )) in an attempt to produce discrete cyclic constructs. While A g + gave a polymeric structure { [Ag(3, 3 -bpy)](Cl O 4 )  H 2 O } 𝑛 (1), with all other metal entities cyclic structures were formed. Interestingly, Hg(C H 3 COO ) 2 produced a dinuclear complex [Hg(3, 3 -bpy)(C H 3 COO ) 2 ] 2  3 H 2 O (2), in which the two 3, 3 -bpy ligands adopt a cis-orientation of the coordinating pyridyl entities. With cis-( N H 3 ) 2 P t 2 + , a cyclic complex 4 was isolated in crystalline form which, according to HRMS, is a trimer. With trans-( N H 3 ) 2 P t 2 + , different species are formed according to 1 H NMR spectroscopy, the nature of which was not established.