calculating atomic charges with AIMPAC

["Dr. Julia Metzker" <jm45/at/york.ac.uk>]

 I currently have an undergraduate student who is attempting to compare
 charges of methylated benzene and ferrocene systems using the AIMPAC
 software.  In the case of hexamethyl benzene and the ferrocene
 analogues he
 is getting very large negative charges on some the ring carbons (-5 to
 -20)
 and small positive charges on iron (0.5) Can anyone tell me if there is
 a
 problem with the program or if the ring system can not be treated with
 this
 method?
 Thank you,
 Julia Metzker
 University of York
 Department of Chemistry