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Ring Currents in the Dismutational Aromatic Si 6 R 6
Author(s) -
Berger Raphael J. F.,
Rzepa Henry S.,
Scheschkewitz David
Publication year - 2010
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201003988
Subject(s) - aromaticity , ring (chemistry) , ring current , chemistry , electromagnetic shielding , crystallography , planar , paramagnetism , condensed matter physics , materials science , molecule , physics , magnetic field , organic chemistry , earth's magnetic field , computer graphics (images) , quantum mechanics , computer science , composite material
Rollercoaster ring currents in an isomer of hexasilabenzene cause the large range of 29 Si NMR shifts of the central four Si atoms. The topologies of the magnetically induced currents result in the deshielding of the substituted Si atoms and the shielding of those without substituents. The absence of a paramagnetic vortex in the ring center suggests that the dismutational aromaticity of the investigated hexasilabenzene isomer is akin to spherical rather than planar aromaticity.