Tetrahedron p. 3043 - 3045 (1980)
Update date:2022-08-02
Topics:
Alberti, Angelo
Colonna, Francesco Paolo
Pedulli, Gian Franco
The spin adducts of triphenylsilyl, triphenylgermyl and triphenylstannyl radicals with γ-pyrone, γ-thiopyrone, thia-γ-pyrone and thia-γ-thiopyrone have been studied by ESR spectroscopy.The spectral parameters indicate that these radicals adopt the conformation where the O-M or S-M bonds are eclipsed with the 2pz orbital of the γ-carbon, despite the absence of hindering substituent groups in proximity of the radical centre.The electronic effects of sulphur and oxygen on the spin density distribution are also discussed.
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Doi:10.1039/P19810002282
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(2020)