The objective of this work is to determine the maximum stretch of the C-C b
ond before it misses the character of single bond, employing both the Atoms
in Molecules (AIM) and Electron Localization Function (ELF) methods. It wa
s concluded that C-C distances up to 2.0 Angstrom could be considered singl
e bonds. (C) 2001 Elsevier Science B.V. All rights reserved.