A [4+2] cycloaddition reaction of fullerene C70 encapsulating two molecules of H2

DOI

Bibliographic Information

Other Title
  • 水素分子を2個内包したフラーレンC70の[4+2]環化付加反応

Abstract

Previously, we have synthesized fullerene C70 encapsulating one or two molecule(s) of H2. Although the interaction between the encapsulated H2 and C70 cage is quite minute for H2@C70, it is expected that the difference in chemical reactivity of the outer C70 cage becomes appreciable when two molecules of H2 are incorporated inside the cage. Thus, we conducted a [4+2] cycloaddition reaction with 9,10-dimethylanthracene(DMA). Variable temperature NMR spectra for a solution of mixture of H2@C70, (H2)2@C70, and C70 (molar ratio, 70:2:28) and DMA in ODCB-d4 were taken at 30, 40, 50.degree.C. We found that the equilibrium constant for the addition of DMA to (H2)2@C70 at each temperature is about 15% lower than that to H2@C70, demonstrating the "apparently" decreased reactivity of (H2)2@C70 toward DMA. The results of the theoretical calculation will be also discussed.

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Details 詳細情報について

  • CRID
    1390282680531735680
  • NII Article ID
    130004728858
  • DOI
    10.11494/kisoyuki.2009.0.240.0
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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