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		<title><![CDATA[Multiwfn forum / ESP at nuclear position vs ESP at CP of nucleus]]></title>
		<link>http://sobereva.com/wfnbbs/viewtopic.php?id=1599</link>
		<description><![CDATA[The most recent posts in ESP at nuclear position vs ESP at CP of nucleus.]]></description>
		<lastBuildDate>Mon, 03 Feb 2025 23:01:23 +0000</lastBuildDate>
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			<title><![CDATA[Re: ESP at nuclear position vs ESP at CP of nucleus]]></title>
			<link>http://sobereva.com/wfnbbs/viewtopic.php?pid=4873#p4873</link>
			<description><![CDATA[<p>First, note that nuclear CP position is not exactly identical to nuclear position (although for non-hydrogen atoms, the difference is almost negligible).</p><p>Second, note that ESP defined in common way at a nuclear position is meaningless, because it must be infinitely large due to the contribution to ESP from the nucleus at the corresponding position. What is meaningful at a nuclear position is the ESP without contribution of the corresponding nucleus, that is &quot;Total ESP without contribution from nuclear charge of atom xxx&quot; in the output of main function 1 of Multiwfn. The ESP value at nuclear position involved in Suresh&#039;s work corresponds to this quantity.</p>]]></description>
			<author><![CDATA[dummy@example.com (sobereva)]]></author>
			<pubDate>Mon, 03 Feb 2025 23:01:23 +0000</pubDate>
			<guid>http://sobereva.com/wfnbbs/viewtopic.php?pid=4873#p4873</guid>
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			<title><![CDATA[ESP at nuclear position vs ESP at CP of nucleus]]></title>
			<link>http://sobereva.com/wfnbbs/viewtopic.php?pid=4871#p4871</link>
			<description><![CDATA[<p>Hi,</p><p>I have been using Multiwfn to try and do topology analysis. I&#039;ve noticed a discrepancy in values, and was wondering which value is appropriate. I followed the procedure in 4.1.2 in the manual emulating getting dVnuc like Suresh&#039;s work. <br />If I submit a1, I get:<br />Total ESP:&#160; 0.9771869440E+03 a.u. ( 0.2659061E+05 eV, 0.6131946E+06 kcal/mol)<br /> Total ESP without contribution from nuclear charge of atom&#160; &#160; &#160;1:<br /> -0.5916237480E+01 a.u. ( -0.1609890E+03 eV, -0.3712498E+04 kcal/mol)</p><p>Now, if I use the same input file and submit:<br />2<br />2<br />3<br />0</p><p>get CPs and coordinates I get this line for atom1:<br />7&#160; &#160; 0.33664193&#160; &#160;-0.14486139&#160; &#160; 1.08024924&#160; &#160;(3,-3)&#160; &#160;Nucleus:&#160; &#160; 1(La) (in Bohr)</p><p>If I go back to 1 Output all properties at a point<br />and submit <br />0.33664193&#160; &#160;-0.14486139&#160; &#160; 1.08024924<br />and select that these coordinates are in bohr I get:<br />Total ESP:&#160; 0.3456113230E+10 a.u. ( 0.9404562E+11 eV, 0.2168746E+13 kcal/mol)</p><p>Can you explain which value is more applicable to MESP topology analysis and using dV values like Suresh&#039;s work?</p>]]></description>
			<author><![CDATA[dummy@example.com (MLM211)]]></author>
			<pubDate>Mon, 03 Feb 2025 22:16:53 +0000</pubDate>
			<guid>http://sobereva.com/wfnbbs/viewtopic.php?pid=4871#p4871</guid>
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