Dear William,
This is difficult to help as you did not provide a lot information
about what you did...
I looked at your structure and it looks like a modified amino-acid,
but not exactly as this is not a dipeptide... Do you want to derive
RESP charges for this whole molecule? or do you want to derive charges
for a particular/corresponding fragment? (one could understand errors
(i. e. the bad charge values you reported) in the fit if the
constraints defined to design the fragments are not well defined...).
I used R.E.D. Server as defined at:
http://q4md-forcefieldtools.org/REDS/faq.php#3 &
http://q4md-forcefieldtools.org/REDS/faq.php#21
- The Ante_R.E.D. 2.0 job to generate the .P2N file: R.E.D. Server job: P7686
(the atom order has been modofied by Ante_R.E.D.
http://cluster.q4md-forcefieldtools.org/~ucpublic1/ADF1ADFCFjrwFXVADFHRGSLxADFtyG6W2JoWTysLt1/P7686.html
The corresponding Java applet:
http://cluster.q4md-forcefieldtools.org/~ucpublic1/ADF1ADFCFjrwFXVADFHRGSLxADFtyG6W2JoWTysLt1/P7686/javaappletp2n-1.html
The corresponding P2N file:
http://cluster.q4md-forcefieldtools.org/~ucpublic1/ADF1ADFCFjrwFXVADFHRGSLxADFtyG6W2JoWTysLt1/P7686/Mol_antered1-out.p2n
- Then, I modified the total charge value of your molecule in the P2N file
REMARK CHARGE-VALUE 1
- The R.E.D. IV job to generate the .mol2 file: R.E.D. Server job: P7688
http://cluster.q4md-forcefieldtools.org/~ucpublic1/ADF1ADFf2IY3YV7ADFr8OYbP0kodeOQpVkttuADFADFADF/P7688.html
The corresponding Java applet:
http://cluster.q4md-forcefieldtools.org/~ucpublic1/ADF1ADFf2IY3YV7ADFr8OYbP0kodeOQpVkttuADFADFADF/P7688/javaappletmol2-1.html
The corresponding mol2 file:
http://cluster.q4md-forcefieldtools.org/~ucpublic1/ADF1ADFf2IY3YV7ADFr8OYbP0kodeOQpVkttuADFADFADF/P7688/Data-R.E.D.Server/Mol_m1-o1.mol2
-> the optimized geometry is similar to that you reported in the
"KP92_Esp_Low.log" MEP file...
(you have an intra-molecular hydrogen bond that might not be suitable...)
-> As you can see in the .mol2 file (a FF library file format similar
to the prep one; See
http://q4md-forcefieldtools.org/Tutorial/leap-mol2.php &
http://q4md-forcefieldtools.org/Tutorial/leap-mol3.php) all the charge
values seems reasonable...
I hope this helps...
regards, Francois
PS By now, any user can follow the R.E.D. Server .log file (provides
the status of the job) from the Qstat interface...
See
http://cluster.q4md-forcefieldtools.org/qstat/
> I am using Gaussian 09 version c.01 to perfrom optimization and esp
> density calculation. When I used Antechamber to generate prepi file
> using RESP charge, I fond many atom have charge larger than 1 or
> smaller than -1. Here is my gaussian input:
> ====
> %chk=./KP92_ESP_Low.chk
> #HF/6-31G* SCF=Tight Pop=MK Geom=AllCheck Guess=Read
> IOp(6/33=2,6/41=4,6/42=4)
>
> KP92 ESP charge high density
>
> 1 1
> ==========
>
> I am using the following command to generate prepi file:
> antechamber -fi gout -i KP92_Esp_Low.log -fo prepi -o KP92_Low.prepi
> -c resp -j 4 -at amber -rn KP92
>
> Here is the file I generated:
> =========
>
> $ more KP92_Low.prepi
> 0 0 2
>
> This is a remark line
> molecule.res
> KP92 INT 0
> CORRECT OMIT DU BEG
> 0.0000
> 1 DUMM DU M 0 -1 -2 0.000 .0 .0 .00000
> 2 DUMM DU M 1 0 -1 1.449 .0 .0 .00000
> 3 DUMM DU M 2 1 0 1.522 111.1 .0 .00000
> 4 O3 O M 3 2 1 1.540 111.208 180.000 -1.501803
> 5 C7 C M 4 3 2 1.226 68.464 -43.436 2.155189
> 6 C8 CT 3 5 4 3 1.513 123.380 -31.018 4.993839
> 7 H11 HC E 6 5 4 1.094 113.517 -172.179 -1.612854
> 8 H12 HC E 6 5 4 1.096 108.824 66.261 -1.612854
> 9 H13 HC E 6 5 4 1.093 108.913 -50.338 -1.612854
> 10 N3 N M 5 4 3 1.380 120.343 149.629 -4.227657
> 11 H10 H E 10 5 4 1.011 119.713 -165.969 1.203058
> 12 C2 CT M 10 5 4 1.452 117.929 -8.719 4.340736
> 13 C1 C B 12 10 5 1.526 111.997 -159.390 -0.741272
> 14 O1 O E 13 12 10 1.225 123.452 -151.271 0.037839
> 15 O2 OS S 13 12 10 1.325 113.176 30.494 -0.797118
> 16 C9 CT 3 15 13 12 1.453 117.159 177.504 4.006875
> 17 H14 H1 E 16 15 13 1.091 109.842 60.796 -1.213156
> 18 H15 H1 E 16 15 13 1.092 109.709 -60.215 -1.213156
> 19 H16 H1 E 16 15 13 1.088 105.038 -179.632 -1.213156
> 20 H1 H1 E 12 10 5 1.104 107.621 -42.807 -1.164949
> 21 C3 CT M 12 10 5 1.547 112.374 75.545 1.281904
> 22 H2 HC E 21 12 10 1.094 109.757 85.172 -0.802035
> 23 H3 HC E 21 12 10 1.091 107.929 -32.252 -0.802035
> 24 C4 CT M 21 12 10 1.541 110.869 -151.779 4.097580
> 25 H4 H1 E 24 21 12 1.091 110.308 83.816 -1.272201
> 26 H5 H1 E 24 21 12 1.095 111.537 -35.165 -1.272201
> 27 N1 NT M 24 21 12 1.474 113.240 -156.118 -2.261363
> 28 H6 H E 27 24 21 1.013 117.985 -99.702 0.245473
> 29 C5 CM M 27 24 21 1.325 124.425 79.906 1.707264
> 30 N2 NT B 29 27 24 1.316 122.276 -2.405 -2.342325
> 31 H9 H E 30 29 27 1.015 118.201 -179.452 0.807641
> 32 H17 H E 30 29 27 1.032 123.585 -6.081 0.807641
> 33 C6 CT M 29 27 24 1.519 116.883 174.249 3.546339
> 34 H7 H1 E 33 29 27 1.093 109.683 41.607 -1.007917
> 35 H8 H1 E 33 29 27 1.093 108.694 -77.245 -1.007917
> 36 Cl1 Cl M 33 29 27 1.788 113.745 162.660 -1.552555
>
>
> LOOP
>
> IMPROPER
> C8 N3 C7 O3
> C7 C2 N3 H10
> C2 O1 C1 O2
> C6 N1 C5 N2
>
> DONE
> STOP
> =========
>
> I attached my gaussian log file. Could anybody help me with this big
> number of RESP charge issue?
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Received on Wed Apr 18 2012 - 01:00:04 PDT
