The aromatic behavior of three membered ring compounds has been analyzed by
mean of GAUSSIAN94 theoretical calculations at B3LYP//6-311 + + G(2d,p) le
vel. Diamagnetic exaltation values obtained from magnetic susceptibilities
as well as NICS show the expected aromatic character of the cyclopropyl cat
ion, but the correspondent anion also shows aromatic behavior. This unexpec
ted result is analyzed as well as the character of the other three membered
ring derivatives. (C) 1999 Elsevier Science B.V. All rights reserved.