2008 Student Research Conference:
21st Annual Student Research Conference

Synthesis of Lead Tris-(2-pyridylmethyl) Amine Compounds with Halides
Melissa K. Thorstad
Dr. James M. McCormick and Dr. Russell G. Baughman, Faculty Mentors

As part of a continuing investigation of the coordination chemistry of Pb2+, several new Pb2+-TPA compounds (TPA = tris-(2-pyridylmethyl)amine) with halide counter ions have been synthesized. X-ray crystal structure analysis of the compounds reveals that there are three distinct structural motifs. The first, exhibited only with Cl- as the counter ion, is a dimer with each Pb2+ coordinated to one TPA and three μ-Cl- bridges. The second, adopted by both Cl- and Br- has a cluster of three [Pb(TPA)]2+ centers bridged by halides and [PbX5] units. The Pb2+ in the [PbX5] unit is square pyramidal with the Pb2+ sitting in the basal plane of the halides. The iodine compound also adopts a dimer structure, but there are only two bridging iodides (each Pb2+ has one I- bound terminally) and there are two distinct complexes in asymmetric unit with different Pb–I–Pb bond angles.

Keywords: Inorganic Chemistry, Coordination Complexes, Metal-Ligand Complexes, Lead Chemistry

Topic(s):Chemistry

Presentation Type: Oral Paper

Session: 32-3
Location: VH 1320
Time: 1:45

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