RELATIVE DISSOCIATION-ENERGIES OF SINGLY AND DOUBLY-CHARGED FULLERENEIONS, C-N(Z+), FOR N = 52 TO 70

Relative activation energies for dissociation of fullerene ions C-n(z) into C-n-2(z+) + C-2 have been determined for z = 1 and 2, covering the size range 52 less than or equal to n less than or equal to 70. Th ese data are derived from measured appearance energies of fragment ion s, obtained by electron impact ionization of C-70, With the help of th e finite heat bath theory. The present results are compared With exper imental and theoretical values for C-2 loss reported in the literature . (C) 1997 Elsevier Science B.V.