“…elongation of specific C-C bonds in the cage moiety as observed by previous authors (Flippen -Anderson et al, 1991;Linden et al, 2005;Kruger et al, 2005;Kruger et al, 2006, Boyle et al, 2007a. The shortest C-C bond lengths in the cage occur between C1-C7, C1-C2, C4-C5 and C9-C10, with the values ranging between 1.499-1.533 Å.…”