It was found that the 2-(p-fluorophenyl)hexafluoroisopropyl radical produced by thermal dissociation of the Polishchuk dimer [C(CF3)2C6H4F]2 can withdraw, under mild conditions, the H atom from the methyl group of toluene and mesitylene to form the corresponding radicals, whose addition to [60]fullerene occurs more selectively than in the case of photochemical production of these radicals. Dynamics of the step-by-step multiaddition of the radicals to C60 was studied by ESR. It was found that the addition of benzyl radicals affords adducts containing from 3 to 5 benzyl groups, whereas no spin-adducts with five addends were observed for more bulky 3,5-dimethylphenylmethyl radicals. The interaction of 3,5-dimethylphenylmethyl radicals with the metal complexes (-q2-C60)[IrH(CO)(PPh3)2I and (rl2-C60)[Pd(PPh3)2] was studied for the first time. It was shown that the palladium derivative undergoes only demetallation. In the case of the lr complex, up to 3 radicals add to the fullerene ligand in the same hemisphere where the transition metal is coordinated. The reaction rates are -5 times lower than those for C60. The ability of 2-(p-fluorophenyl)hexafluoroisopropyl radicals to dehydrogenate C60H36 was found.
Die Reaktion der Thiophene (Ia) und (Ib) mit Zink im Zweiphasensystem Schwefelsäure/Methylenchlorid führt zu den Dihydrothiophenen (II) neben geringen Mengen der Tetrahydrothiophene (III).
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