Abstract.
Atomic charges derived from atomic polar tensors are calculated by
the ab initio method using a 6-31G** basis set. This charge, Qa
as defined, is invariant under rotation of the coordinate system, and their
sum for all atoms in the molecule is zero. A test with water and ammonia
molecules shows that it is almost invariant with respect to the basis set.
A linear relationship is found between the atomic charge, Qa,
and the partical charge for the hydrogen atom which is calculated using
the equalization of the electronegativity principle. Also, an excellent
linear regression is obtained when Qa
is ploted against the IR experimental charge.
Keywords.
Keywords Plus.
Dipole Moment; Derivatives; Charges.