0181749 - UFCH-W 20030188 RIV IN eng J - Journal Article
Ludvík, Jiří - Zuman, P.
Electrochemical Proof of the Single Bond Character of the N-N Bonds in some 1,2,4-triazines.
Indian Journal of Chemistry Section A-Inorganic Bio-Inorganic Physical Theoretical & Analytical Chemistry. Roč. 42, - (2003), s. 847-848. ISSN 0376-4710. E-ISSN 0975-0975
R&D Projects: GA ČR GA203/02/0983
Institutional research plan: CEZ:AV0Z4040901
Keywords : acetophenone azines * solid-state * stereochemistry
Subject RIV: CG - Electrochemistry
Impact factor: 0.489, year: 2003

Whereas in molecules containing grouping X=C-C=Y (X, Y = C, 0, N, S) delocalization of electrons take''s place, in, compounds containing the grouping C=N-N=C the central N-N bond has a single bond character and conjugation does not play a role. The single bond character of the N(l)-N(2) bond in 1,2,4-triazin-5-ones has been confirmed based on identity of reduction potential of the 1,6-azomethine bond in the parent compound and of the 1,6-C=N bond in the corresponding 2,3-dihydroderivative. Lack of delocalization has also been proved for acyclic azines. Comparison of half-wave. or peak, potentials is a simple and efficient way to prove or disprove the role of the delocalization of electrons over the studied molecule.
Permanent Link: http://hdl.handle.net/11104/0078271