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Optical spectra, electronic structure and aromaticity of benzannulated N-heterocyclic carbene and its analogues of the type C6H4(NR)2E: (E = Si, Ge, Sn, Pb)

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Abstract

A series of benzannulated N-heterocyclic compounds containing divalent 14 group atoms, C6H4(NR)2EII, E = C, Si, Ge, Sn, Pb, have been studied by various experimental (vibrational and UV-vis spectroscopy) and theoretical (NICS, ISE, ACID) techniques. The methods used confirm 10 π-electron delocalization (aromaticity) in these heterocycles, however, the aromaticity sequences estimated by the criteria based on different physical properties do not coincide.

Graphical abstract: Optical spectra, electronic structure and aromaticity of benzannulated N-heterocyclic carbene and its analogues of the type C6H4(NR)2E: (E = Si, Ge, Sn, Pb)

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Publication details

The article was received on 30 Jan 2017, accepted on 14 Feb 2017 and first published on 14 Feb 2017


Article type: Paper
DOI: 10.1039/C7DT00356K
Citation: Dalton Trans., 2017, Advance Article
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    Optical spectra, electronic structure and aromaticity of benzannulated N-heterocyclic carbene and its analogues of the type C6H4(NR)2E: (E = Si, Ge, Sn, Pb)

    R. R. Aysin, S. S. Bukalov, L. A. Leites and A. V. Zabula, Dalton Trans., 2017, Advance Article , DOI: 10.1039/C7DT00356K

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