title: Self-assembly of N-heterocyclic derivatives of divalent germanium, tin, and lead.
abstract: A new class of exceptionally stable asymmetric N-heterocyclic germylenes, stannylenes, and plumbylenes has been successfully isolated and characterized by single-crystal X-ray diffraction analysis and multinuclear NMR spectroscopy. Their stability results from tetrameric supramolecular aggregation through strong intermolecular Npy →E(II) (E=Ge, Sn, Pb) interactions involving the nitrogen atom of a neighboring pyridine moiety. The electronic structures and stabilities of the prepared divalent derivatives of Ge, Sn, and Pb in monomeric and aggregated forms are discussed based on theoretical investigations.
authors.affiliation: Organosilicon Research Center, Department of Chemistry, University of Wisconsin-Madison, 1101 University Ave, Madison, WI 53706 (USA), Fax: (+1) 608-262-6143. zabula@wisc.edu.
authors.forename: Alexander V
authors.initials: AV
authors.lastname: Zabula
authors.forename: Andrey Yu
authors.initials: AY
authors.lastname: Rogachev
authors.forename: Robert
authors.initials: R
authors.lastname: West
keywords: carbenes; germanium; lead; self-assembly; tin