Re: [Jmol-users] MEP units

2013-05-31 Thread Pshemak Maslak
On 5/30/2013 9:22 AM, Robert Hanson wrote: It's whatever units come from this calculation: public float valueFor(float x0, float d2, int distanceMode) { switch (distanceMode) { case ONE_OVER_D: return (d2 == 0 ? x0 * Float.POSITIVE_INFINITY : x0 / (float) Math.sqrt(d2));

Re: [Jmol-users] MEP units

2013-05-31 Thread Pshemak Maslak
On 5/31/2013 2:02 PM, Pshemak Maslak wrote: On 5/30/2013 9:22 AM, Robert Hanson wrote: It's whatever units come from this calculation: public float valueFor(float x0, float d2, int distanceMode) { switch (distanceMode) { case ONE_OVER_D: return (d2 == 0 ? x0 *

Re: [Jmol-users] MEP units

2013-05-31 Thread Robert Hanson
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

Re: [Jmol-users] MEP units

2013-05-31 Thread Robert Hanson
On Fri, May 31, 2013 at 4:27 PM, Pshemak Maslak p...@chem.psu.edu wrote: On 5/31/2013 5:04 PM, Robert Hanson wrote: In other words, it's Joules. The numbers displayed are NOT in Jules. (it is e^2 (au)/d (angstrom)). No, of course not. I have no idea what I was referring to there.

[Jmol-users] MEP units

2013-05-29 Thread Pshemak Maslak
I know I have asked this before, but I still cannot figure it out: What are the MEP units when the rainbow range is set? I have tried eV, hartrees, but these do not match pictures usually shown with the range of -25/+25 kcal/mol or -50/+ 50 kcal/mol. If they are not energy, what are they?

Re: [Jmol-users] MEP units

2013-05-29 Thread Otis Rothenberger
When using Spartan, these ranges are set in kcal/mole - i.e. using Spartan to calculate the MEP. However, as I mentioned before, because of the seeming inconstancy of charge units fed to Jmol by various file sources, I wonder if what the Jmol MEP calculation produces is really a relative