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C60-fullerenides of ytterbium and lutetium |
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| Authors: | M N Bochkarev I L Fedushkin V I Nevodchikov A V Protchenko H Schumann F Girgsdies |
| Institution: | a G.A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Nizhny Novgorod, Russian Federation b Institut für Anorganische und Analytische Chemie der Technischen Universität Berlin, Straße des 17. Juni 135, D-10623, Berlin, Germany |
| Abstract: | Cp#2Yb (Cp#=C5H4(CH2)2NMe2) has been obtained by reaction of YbI2(THF)2 with 2 equiv. of C5H4(CH2CH2NMe2)K in THF. The X-ray structure analysis shows a bent structure with intramolecular coordination of both nitrogen atoms to ytterbium. The reaction of C60-fullerene with Cp#2Yb leads to the formation of the fullerenide derivative Cp#2Yb]2C60, which shows an ESR signal in the solid state and in THF solution at room temperature (solid: ΔH = 50 G, G = 1.9992; solution: ΔH = 10 G, G = 2.0001) and a magnetic moment of 3.6 BM. The lutetium fullerenides CpLu(C60)(DME) (3) and Cp*Lu(C60)(DME)(C6H5CH3) (4), (Cp = η5?C5H5, Cp* = η5?C5Me5), were obtained by reaction of C60 with CpLu(C10H8) (DME) and Cp*Lu(C10H8) (DME) in toluene. Both complexes are paramagnetic (μeff = 1.4 and 0.9 BM) and exhibit temperature-dependent ESR signals (293 K: g = 1.992 and 2.0002 respectively). |
| Keywords: | Ytterbium complexes Lutetium complexes C60-fullerinide complexes |
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