In other words, it's Joules.

If the charges in the file are in atomic units (multiple of electron charge) and the distances are measured in angstroms the Jmol calculated values of electrostatic potential can be converted into kcal/mol by multiplying by 332.

I think that is what Jmol does with Spartan files.

OK. If you want to visualize those colors in kcal/mol, then what you would do is to pre-multiply the partial charges by that constant

{*}.partialCharge = {*}.partialCharge.all.mul(332.0637)

Are you saying there is something special Jmol does with partial charges with Spartan files? I don't think so...



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Robert M. Hanson
Larson-Anderson Professor of Chemistry
Chair, Chemistry Department
St. Olaf College
Northfield, MN

If nature does not answer first what we want,
it is better to take what answer we get.

-- Josiah Willard Gibbs, Lecture XXX, Monday, February 5, 1900