Probing the aromaticity of unsaturated N-heterocyclic carbenes and their heavy analogues with the EDDB criterionстатья
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Дата последнего поиска статьи во внешних источниках: 17 июня 2021 г.
Аннотация:Three series of N-heterocyclic carbene analogues including Arduengo-type systems(HCNtBu)2E (1; E=C, Si, Ge, Sn), their benzannulated derivatives C6H4(NCH2tBu)2E(2; E = C, Si, Ge, Sn, Pb), and amidophenolates C6H2tBu2(O)NtBuE (3; E = Ge, Sn, Pb)were studied by the electron density of delocalized bonds (EDDB) method. The results obtainedconfi rmed the π-aromaticity of systems 1—3. The aromaticity series were obtained. The degree ofaromaticity of heavy carbene analogues increases on going down Group 14 of the periodic system.