Author/Authors :
Tumanskii، نويسنده , , B.L. and Kalina، نويسنده , , O.G. and Sokolov، نويسنده , , V.I. and Chistyakov، نويسنده , , A.L. and Stankevich، نويسنده , , I.V. and Han، نويسنده , , A. and Murata، نويسنده , , Y. and Komatsu، نويسنده , , K.، نويسنده ,
Abstract :
Radical reactions of C60 dimer connected by a silicon bridge and single bond (C60SiPh2C60) were studied by EPR-spectroscopy. Attack of phosphoryl radicals or 2,2,6,6-tetramethylpiperidine-N-oxyl on the silicon atom leads to radical substitution of the fullerene and formation of a new fullerenyl radical, the structure of the former being confirmed by quantum-chemical calculations (DFT). The formation of only one type of spin-adduct on addition of phosphoryl radicals to the fullerene core is associated with small distortion of the fullerene cage in C60SiPh2C60. Geometry of fullerene core in dimer differs only slightly from C60 owing probably to flexibility of Si–C and C–C bonds which share a five-membered ring.
