CCL: MK fitting of ESP




Dear all,

            When I use MK fitting procedure for generating the charges on the molecule from ESP of the molecule, sum of all the charges on the atom is not going to zero. I used following command to generate the charge from ESP.

pop=mk iop(6/42=6)

This is to get the charges independent of the orientation of the molecule.

Can anybody suggest me how to get zero charge when I sum over all the charges for the above method.
 
With Regards,

Ravi Kumar Venkatraman,
c/o Prof. Siva Umapathy,
IPC Dept., IISc.,
Bangalore, INDIA.
Phone No: +91-9686933963