The first synthesis of the parent TMM-C60 adduct 1 was achieved by means of Pd°-mediated [3 + 2] cycloaddition and its structure was unambiguously proved by spectroscopic means (1H and 13C NMR and MS); a pentane solution of the adduct 1 exhibited a fluorescence emission spectrum with λmax 704 nm and vibronic fine structure at ambient temperature.
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Shiu et al. (1994) studied this question.
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