20th Annual Student Research Conference
Science
Synthesis of Lead Tris-(2-pyridylmethyl) Amine Chloride
Melissa K. Thorstad* and Gabriel B. Hall
Dr. Russell G. Baughman and Dr. James McCormick, Faculty Mentors
As part of a continuing study of Pb2+ coordination chemistry with TPA, tris-(2-pyridylmethyl) amine, two new compounds have been synthesized. Compound (I), μ-Cl 3[Pb(TPA)]2Clx(OH)y ∙ zH2O, is a dimer with three bridging chlorides and exhibits mirror symmetry. The partial occupancy of the Cl- not bound to the Pb2+ in the X-ray crystal structure indicates that (I) is a non-stoichiometric compound. Compound (II), Pb6(TPA)4Cl12, contains a square pyramidal “PbCl5” structural unit where the Pb2+ sits nearly in the basal plane of the square pyramid. This is unexpected on the basis of VSEPR Theory, which predicts that the Pb2+ lone pair should manifest itself by a distortion of the structure leading to the Pb2+ sitting below the basal plane of the square pyramid.
Keywords: Inorganic Chemistry, Lead Compounds
Topic(s):Chemistry
Presentation Type: Oral Paper
Session: 45-1
Location: VH 1212
Time: 1:15 pm