title: A new 2-carboxylate-substituted 4,4'-bipyridine ligand: coordination chemistry of 4,4'-bipyridine-2-carboxylic acid and its synthetic intermediate 2-methyl-4,4'-bipyridine.
abstract: The first monocarboxylate-substituted 4,4'-bipyridine ligand, 4,4'-bipyridine-2-carboxylic acid (4-(pyridin-4-yl)pyridine-2-carboxylic acid (PPCAH)), has been successfully synthesized from 4,4'-bipyridine. Reactions with transition metals zinc and manganese were used to establish the coordination characteristics of the product, 4,4'-bipyridine-2-carboxylic acid, and of the synthetic intermediate, 2-methyl-4,4'-bipyridine, by single-crystal X-ray diffraction. The ligand PPCAH is useful for the formation of metal-containing building blocks that can be used in the assembly of mixed-metal framework materials. The synthesis and structure of one such mixed-metal coordination polymer, Cu(PPCA)(2)HgI(2), is also presented.
authors.affiliation: Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA.
authors.forename: Chun-Long
authors.initials: CL
authors.lastname: Chen
authors.forename: Joseph M
authors.initials: JM
authors.lastname: Ellsworth
authors.forename: Andrea M
authors.initials: AM
authors.lastname: Goforth
authors.forename: Mark D
authors.initials: MD
authors.lastname: Smith
authors.forename: Cheng-Yong
authors.initials: CY
authors.lastname: Su
authors.forename: Hans-Conrad
authors.initials: HC
authors.lastname: Zur Loye