C60O3, a fullerene ozonide:: Synthesis end dissociation to C60O and O2

被引:102
作者
Heymann, D [1 ]
Bachilo, SM
Weisman, RB
Cataldo, F
Fokkens, RH
Nibbering, NMM
Vis, RD
Chibante, LPF
机构
[1] Rice Univ, Dept Geol & Geophys, Houston, TX 77251 USA
[2] Rice Univ, Dept Chem, Houston, TX 77251 USA
[3] Rice Univ, Rice Quantum Inst, Houston, TX 77251 USA
[4] Soc Lupi Chem Inst, I-00133 Rome, Italy
[5] Univ Amsterdam, Inst Mass Spectrometry, NL-1018 WS Amsterdam, Netherlands
[6] Free Univ Amsterdam, Dept Phys & Astron, NL-1081 HV Amsterdam, Netherlands
关键词
D O I
10.1021/ja0025651
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
An unstable intermediate has been detected and isolated in the reaction of ozone with C-60 in solution. On the basis of its UV-vis absorption spectrum, the measured release of O-2 in its decay to the epoxide C60O, and the first-order kinetics of this reaction, the intermediate has been identified as C60O3, a primary ozonide. This [6,6]-closed adduct of ozone with C-60 thermally dissociates to C60O plus O-2 in toluene solution, octane solution, and the solid phase with rate constants (at 23 degreesC) of 4.6 x 10(-2), 1.3 x 10(-3): and 3.0 x 10(-3) min(-1), respectively. The activation energy for dissociation in toluene solution is approximately 89 kJ mol(-1) Semiempirical quantum calculations indicate that the formation and subsequent dissociation of C60O3 are both exothermic processes. These findings constitute the first observation of a fullerene ozonide.
引用
收藏
页码:11473 / 11479
页数:7
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