Crystallographic studies and synthesis of hexakis (imidazole) nickle(2+) complexes with substituted N-Benzoylalnine ligands
Presentation Type
Abstract
Faculty Advisor
Mark Whitener
Access Type
Event
Start Date
25-4-2025 12:00 PM
End Date
25-4-2025 1:00 PM
Description
Crystallographic Studies and Synthesis of Hexakis(imidazole)nickel(2+) Complexes with Substituted N-Benzoylalanine Ligands. A quasiracemates contains two molecules of opposite handedness that are similar in shape but, are chemically distinct. The chemical difference is usually a small change in one group such as chlorine substituting for bromine. Many organic quasiracemates consist an chiral R configuration molecule with one functional group paired with a second chiral molecule of S configuration with a different functional group. These two molecules usually assemble about a pseudo-center of symmetry, often mimicking the arrangement of the two true enantiomers in the racemates of each components. We studied these compounds to examine the role of shape of different groups in crystal packing, and potentially to prepare a crystals with desired properties. Previously, we prepared square planar metal copper(II) complexes to assemble a centrosymmetric-like arrangement of quasientomeric ligands with the metal serving as the quasi-inversion center. In these complexes, the quasiracemate ligand were directly bound to the copper. We attempted expand the type of quasiracemates by preparing crystals of a nickel complex of imidazole. In these complexes, the ligands are not directly bound to the metal but are hydrogen bonded to the metal bound imidazole. We prepared crystals using -Br, -Cl, -CH3, and NO2 as the variable group. We have sent the crystals to our collaborator for X-ray data collection. We have one preliminary structure to report.
Crystallographic studies and synthesis of hexakis (imidazole) nickle(2+) complexes with substituted N-Benzoylalnine ligands
Crystallographic Studies and Synthesis of Hexakis(imidazole)nickel(2+) Complexes with Substituted N-Benzoylalanine Ligands. A quasiracemates contains two molecules of opposite handedness that are similar in shape but, are chemically distinct. The chemical difference is usually a small change in one group such as chlorine substituting for bromine. Many organic quasiracemates consist an chiral R configuration molecule with one functional group paired with a second chiral molecule of S configuration with a different functional group. These two molecules usually assemble about a pseudo-center of symmetry, often mimicking the arrangement of the two true enantiomers in the racemates of each components. We studied these compounds to examine the role of shape of different groups in crystal packing, and potentially to prepare a crystals with desired properties. Previously, we prepared square planar metal copper(II) complexes to assemble a centrosymmetric-like arrangement of quasientomeric ligands with the metal serving as the quasi-inversion center. In these complexes, the quasiracemate ligand were directly bound to the copper. We attempted expand the type of quasiracemates by preparing crystals of a nickel complex of imidazole. In these complexes, the ligands are not directly bound to the metal but are hydrogen bonded to the metal bound imidazole. We prepared crystals using -Br, -Cl, -CH3, and NO2 as the variable group. We have sent the crystals to our collaborator for X-ray data collection. We have one preliminary structure to report.
Comments
Poster presentation at the 2025 Student Research Symposium.