Avent, Anthony G, Abdul-Sada, Ala'a K, Clare, Brian W, Kepert, David L, Street, Joan M and Taylor, Roger (2003) In the first proven S(N)2 ' fullerene reaction, both C-3 and C1 C60F36 hydrolyse to C-1 isomers of C60F35OH that eliminate HF to give epoxides C60F34O; C60F36O oxides are shown to be ethers, and a fourth isomer of C60F36 exists. Organic and Biomolecular Chemistry, 1 (6). pp. 1026-1033. ISSN 1477-0520

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Abstract

On standing in organic solvents containing traces of water, C-3 and C-1 isomers of C60F36 slowly convert to C-1 isomers of C60F35OH. Both fluorofullerenols eliminate HF during EI mass spectrometry to give C60F34O epoxides, one fullerenol being much less stable than the other to the extent that the mass spectrum shows only the epoxide. Both C60F35OH isomers have C-1 symmetry, one being identified by the remarkable linear relationship between chemical shifts in its F-19 NMR spectrum and those in the spectrum of C1C60F36; the spectrum of the other shows the pattern of C3C60F36 rendered asymmetrical by the replacement of one F by OH. The reactions are facilitated by the presence of isolated double bonds, and provide the first proven examples of an S(N)2' reaction of a fullerene derivative. Our observation explains why only a limited number of fluorines are readily replaced in C60F36 and why C60F18 is by contrast much more resistant to hydrolysis. We have isolated also a pure isomer of C60F36O, which is shown to be an oxahomofullerene (ether) apparently derived from C1C60F36, and an impure fraction comprising a fourth isomer of C60F36, a trifluoromethyl derivative of C60F36, a second isomer of C60F36O, and an unknown species of 1392 u.

Item Type:	Article
Additional Information:	AAS carried out the advanced analytical chemistry and mass spectroscopy necessary for this publication and co-authored the manuscript in collaboration with the late RT
Schools and Departments:	School of Life Sciences > Chemistry
Depositing User:	Alaa Abdul-Sada
Date Deposited:	06 Feb 2012 18:34
Last Modified:	14 May 2012 15:43
URI:	http://sro.sussex.ac.uk/id/eprint/17242

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