An algorithm for scaling a vibrational force field is developed and impleme
nted in a computer program. A method to label the calculated frequencies is
developed as well, that allows the automatic application of such program t
o any force field, independently of the level of theory used to generate it
. This procedure has been tested with the scaled force fields of pyrazine a
nd pyridine and the results have been completely satisfactory. (C) 1999 Els
evier Science B.V. All rights reserved.