# CCL: a really silly question

• From: David Shobe <avidshobe- -yahoo.com>
• Subject: CCL: a really silly question
• Date: Thu, 12 May 2016 17:56:22 +0000 (UTC)

```The formula is E = (1 / 4 pi E0) (q1 q2 / r12).   Thus your conversion
factor is 1 / (4 pi E0) where E0
= 8.854 187 817... x 10-12  J^-1 C^2 m-1.
Sorry for the lack of typography.
On Thursday, May 12, 2016 10:33 AM, Richard Leo Wood rwoodphd##msn.com
<owner-chemistry%%ccl.net> wrote:
Sent to CCL by: "Richard Leo Wood" [rwoodphd ~~ msn.com]
I am trying to compute the electrostatic interaction for a pair of atoms
> from an energy minimized structure.
I have the charges on the two atoms as -0.47 and -0.55.  They are 3.15
Angstroms apart.  So, E = (-0.55*-0.45)e-38 C^2/3.15e-8 m.
I get 8.21e-32 C^2/m.  My question is how do I convert this to Joules?
Richard
-= This is automatically added to each message by the mailing script =-
Subscribe/Unsubscribe:
Job: http://www.ccl.net/jobs
------=_Part_1049358_995418990.1463075782335
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica,
Arial, Lucida Grande, sans-serif;font-size:13px"><div
id="yui_3_16_0_ym19_1_1463074875924_34604" dir="ltr">The
formula is E = (1 / 4 pi E0) (q1 q2 / r12). &nbsp; Thus your conversion
factor is 1 / (4 pi E0) where E0 =&nbsp;<b style="color: rgb(255, 0,
0); font-family: monospace; font-size: large; white-space: nowrap;
background-color: rgb(204, 226, 243);"
id="yui_3_16_0_ym19_1_1463074875924_34936">8.854&nbsp;187&nbsp;817...&nbsp;x&nbsp;10<sup
id="yui_3_16_0_ym19_1_1463074875924_34937">-12</sup></b>&nbsp;
J^-1 C^2 m-1.</div><div
id="yui_3_16_0_ym19_1_1463074875924_34604"
dir="ltr"><br></div><div
id="yui_3_16_0_ym19_1_1463074875924_34604"
dir="ltr">Sorry for the lack of typography.&nbsp;</div>
<div
class="qtdSeparateBR"><br><br></div><div
class="yahoo_quoted" style="display: block;"> <div
style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida
Grande, sans-serif; font-size: 13px;"> <div style="font-family:
HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;
font-size: 16px;"> <div dir="ltr"><font
size="2" face="Arial"> On Thursday, May 12, 2016 10:33
AM, Richard Leo Wood rwoodphd##msn.com &lt;owner-chemistry%%ccl.net&gt;
wrote:<br></font></div>  <br><br> <div
class="y_msg_container"><br>Sent to CCL by: "Richard Leo
Wood" [rwoodphd ~~ msn.com]<br>I am trying to compute the
electrostatic interaction for a pair of atoms <br>&gt; from an energy
minimized structure.<br><br>I have the charges on the two atoms as
-0.47 and -0.55.&nbsp; They are 3.15 <br>Angstroms apart.&nbsp;
So, E = (-0.55*-0.45)e-38 C^2/3.15e-8 m.<br><br>I get 8.21e-32
C^2/m.&nbsp; My question is how do I convert this to
Joules?<br><br>Richard<br><br><br><br>-=
This is automatically added to each message by the mailing script =-<br>To
change<br>the strange characters on the top line to the %% sign. You can
also<br>look up the X-Original-From: line in the mail
header.<br><br>E-mail to subscribers: <a ymailto="mailto:CHEMISTRY%%ccl.net"; href="mailto:CHEMISTRY%%ccl.net";>CHEMISTRY%%ccl.net</a> or
use:<br>&nbsp; &nbsp; &nbsp; <a href="http://www.ccl.net/cgi-bin/ccl/send_ccl_message";
target="_blank">http://www.ccl.net/cgi-bin/ccl/send_ccl_message</a><br><br>E-mail
or use<br>&nbsp; &nbsp; &nbsp; <a href="http://www.ccl.net/cgi-bin/ccl/send_ccl_message";
target="_blank">http://www.ccl.net/cgi-bin/ccl/send_ccl_message</a><br><br<br>&nbsp;
&nbsp; &nbsp; <a href="http://www.ccl.net/chemistry/sub_unsub.shtml";
target="_blank">http://www.ccl.net/chemistry/sub_unsub.shtml</a><br><br>Before
posting, check wait time at: <a href="http://www.ccl.net/";
target="_blank">http://www.ccl.net</a><br><br>Job: <a
href="http://www.ccl.net/jobs";
target="_blank">http://www.ccl.net/jobs </a><br>Conferences:
<a href="http://server.ccl.net/chemistry/announcements/conferences/";
target="_blank">http://server.ccl.net/chemistry/announcements/conferences/</a><br><br>Search
Messages: <a href="http://www.ccl.net/chemistry/searchccl/index.shtml";
target="_blank">http://www.ccl.net/chemistry/searchccl/index.shtml</a><br><br<br>&nbsp;
&nbsp; &nbsp; <a href="http://www.ccl.net/spammers.txt"; target="_blank">http://www.ccl.net/spammers.txt</a><br><br>RTFI: <a