title: Biradical intermediate in the [2 + 2] photocycloaddition of dienes and alkenes to [60]fullerene.
abstract: The photocycloaddition of vinylcyclopropanes to C60 yields stereospecifically a five-membered [60]fullerene adduct. These results suggest a biradical intermediate of the [2 + 2] photocycloaddition between dienes or arylalkenes and C60. An electron transfer between the triplet excited state of C60 and the unsaturated substrates precedes the formation of the intermediate.
authors.affiliation: Department of Chemistry, University of Crete, 71409 Iraklion, Crete, Greece.
authors.forename: Maria
authors.initials: M
authors.lastname: Hatzimarinaki
authors.forename: Manolis M
authors.initials: MM
authors.lastname: Roubelakis
authors.forename: Michael
authors.initials: M
authors.lastname: Orfanopoulos
mesh_terms: D000475:Alkenes / Q000138:chemical synthesis* / Q000737:chemistry / Q000528:radiation effects; D003500:Cyclization; D005609:Free Radicals / Q000138:chemical synthesis / Q000737:chemistry / Q000528:radiation effects; D037741:Fullerenes / Q000737:chemistry* / Q000528:radiation effects; D015394:Molecular Structure; D010777:Photochemistry
chemical_list: D000475:Alkenes; D005609:Free Radicals; D037741:Fullerenes; C069837:fullerene C60