Fig. 7: Synthesis of C60 endofullerenes containing a large endohedral species.
From: Synthesis of endohedral fullerenes by molecular surgery
a Open-cage fullerene 41 has a 17-membered orifice able to accommodate the entry of large guest species. Conditions for encapsulation of the guest species ‘A’ are described in the main text. Stable host-guest complexes CH4@41, Ar@41 and Kr@41 are intermediates in the synthesis of CH4@C60, Ar@C60 and Kr@C60; but more labile guests are characterised in the ‘stoppered’ open-fullerene A@42. Conditions for cage-closure of A@42 have not yet been developed. 1-Chloronaphthalene (1-ClNpth), the ‘Ar’ 5-tert-butylpyridyl substituent structure is shown in Fig. 5a.
