The study of bonding in pyramidanes [(Me3Si)4C4]E (E = Ge, Sn, Pb) by optical (Raman, UV-vis) spectroscopy and quantum-chemical methods
文摘
Raman intensity data evidence covalent nature of the EC bonds. QTAIM data point to their covalent nature with a high degree of polarity. Experimental UV–vis spectra were interpreted by means of TD–DFT calculations. The refined NICS criteria suggest three-dimensional aromaticity of the pyramidanes.