Royal Society of Chemistry, Chemical Communications, 86(52), p. 12733-12736
DOI: 10.1039/c6cc06072b
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Methanofullerenes such as the well-known [70]PCBM are commonly synthesized under harsh conditions to obtain the product as a mixture of site-isomers (namely α, β and minor γ) due to the D5h symmetry of the C70 cage. α-[70]siteisomers are selectively prepared under light and mild conditions with minor or negligible β-[70]siteisomers formation.