title: Heavy allenes and cumulenes e=c=e' and e=c=c=e' (e = p, as, si, ge, sn; e' = C, N, p, as, o, s).
authors.affiliation: Hétérochimie Fondamentale et Appliquée, UMR 5069, Université Paul Sabatier, 118 route de Narbonne, 31062 Toulouse 04, France.
authors.forename: J
authors.initials: J
authors.lastname: Escudié
authors.forename: H
authors.initials: H
authors.lastname: Ranaivonjatovo
authors.forename: L
authors.initials: L
authors.lastname: Rigon