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Unsymmetrical Carbene Homologues: Isolable Pyrido[ b ]‐1,3,2 λ 2 ‐diazasilole, ‐germole and ‐stannole and Quantum‐Chemical Comparison with Unstable Pyrido[ c ] Isomers
Author(s) -
Heinicke Joachim,
Oprea Anca,
Kindermann Markus K.,
Karpati Tamás,
Nyulászi Laszlo,
Veszprémi Tamás
Publication year - 1998
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/(sici)1521-3765(19980310)4:3<541::aid-chem541>3.0.co;2-#
Subject(s) - carbene , quantum chemical , chemistry , physics , computational chemistry , stereochemistry , quantum mechanics , organic chemistry , catalysis , molecule
The first isolable electronically unsymmetrical silylene , dineopentylpyrido[ b ]‐1,3,2 λ 2 ‐diazasilol, and the analogous germylene and stannylene (right) are presented and characterized by NMR and photoelectron spectroscopy. In contrast to nonisolable analogous pyrido[ c ] derivatives, the pyrido[ b ] derivatives possess a symmetrical π charge density distribution in the HOMO from a nodal plane through the pyrido nitrogen atom.