Structural diversity in alkali metal chemistry

Organometallic Chemistry

Main group and transition metal complexes of polycondensed hydrocarbons (PAHs)

PAH compounds allow the coordination of multiple metal ligand fragments (identical or different ones) on their surface. Depending on the coordination site of the metal-ligand fragment on the PAH surface the aromaticity of the PAH can be altered stepwise up to its full interruption. As a result, the geometry of the aromatic is significantly altered. Electronic interaction of the coordinated metal-ligand fragments across the PAH surface can be studied by electrochemical means (e.g. CV) if the metals are electroactive e.g. stable in different oxidation states. PAHs can often be reduced multiple times which results in the formation of polyanions. Alkali metal coordination allows their characterization in the crystalline state.

See our contributions:

  • T. Wombacher, R. Goddard, C. W. Lehmann, J. J. Schneider “Complete charge separation employing full cation encapsulation in the polycondensed aromatic hydrocarbon anions 5,6:11,12-di-o-phenylenetetracene[-1], [-2]”, Dalton Trans., (2018), 47, 10874 (inside back cover)
  • T. Wombacher, R. Goddard, C. W. Lehmann, J. J. Schneider “Bowl shaped deformation in a planar aromatic polycycle upon reduction. Li and Na separated dianions of the aromatic polycycle 5,6:11,12-di-o-phenylene-tetracene”, Dalton Trans., (2017), 46, 14122 – 14129
  • T. Wombacher, R. Goddard, C.W. Lehmann, J.J. Schneider “Organometallic Rubidium and Cesium compounds of the 5,6;11,12-Di-o-Phenylene-tetracene Dianion”, Chem. Commun. , (2017), 53, 7030-7033
  • T. Wombacher, S. Foro, J. J. Schneider “Synthesis and molecular structure of the cationic silver arene complexes of the polycondensed aromatics fluorene, pseudorubrene and truxene”, Eur. J. Inorg. Chem. , (2016), 5152–5160
  • T. Wombacher, A. Gassmann, S. Foro, H. von Seggern, J.J. Schneider “Structural Polymorphism and Thin Film Transistor Behavior in the Fullerene Framework Molecule 5,6;11,12-di-o-Phenylenetetracene”, Angew. Chem. Int. Ed., (2016), 55, 6041-6046
  • T. Wombacher, S. Foro, J.J. Schneider “Adopting a reductive coupling route to DOPT”, Synfacts, (2016), 12, 0253
  • T. Wombacher, S. Foro, J.J. Schneider “Rational synthesis and full spectroscopic characterization of the polyacene 5,6,11,12-di-o-phenylene-tetracene and its reaction intermediates”, Eur. J. Org. Chem. , (2016), 569–578