CCL: How to calculate the solvation enthalpy



Sent to CCL by: Andreas Klamt [klamt:-:cosmologic.de] Dear Hugo,

for splitting delta_G into delta_H and -Tdelta_S you need a thermodynamic method. Out COSMOtherm program is able to do so. Please note that COSMOtherm (i.e. my COSMO-RS ethod) is a statistical thermodynamics method based on COSMO calculations.

For further details see our home page or my book "COSMO-RS: From Quantum Chemistry to Fluid Phase Thermodynamics and Drug Design", Elsevier 2005

Andreas

Hugo Martiniano hugomartiniano_-_sapo.pt wrote:
Sent to CCL by: "Hugo Martiniano" [hugomartiniano(0)sapo.pt]
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 Hello
 I want to calculate solvation enthalpies for some molecules using PCM,
 but these methods calculate Gibbs energies and not enthalpies.
 Is there a straightforward method to calculate the enthalpy from the
 Gibbs energy that the PCM methods produce?
 If not does anyone have any suggestions on how to do this?
 Thank you,
 Hugo
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 <p class=3DMsoNormal><font size=3D2 face=3DArial><span =
 style=3D'font-size:10.0pt;
 font-family:Arial'>Hello<o:p></o:p></span></font></p>
 <p class=3DMsoNormal><font size=3D2 face=3DArial><span =
 style=3D'font-size:10.0pt;
 font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>
 <p class=3DMsoNormal><font size=3D2 face=3DArial><span
 lang=3DEN-GB =
 style=3D'font-size:
 10.0pt;font-family:Arial;mso-ansi-language:EN-GB'>I want to calculate =
 <span
 class=3DSpellE>solvation</span> enthalpies for some molecules using
 PCM, =
 but
 these methods calculate Gibbs energies and not =
 enthalpies.<o:p></o:p></span></font></p>
 <p class=3DMsoNormal><font size=3D2 face=3DArial><span
 lang=3DEN-GB =
 style=3D'font-size:
 10.0pt;font-family:Arial;mso-ansi-language:EN-GB'>Is there a =
 straightforward
 method to calculate the enthalpy from the Gibbs energy that the PCM =
 methods
 produce?<o:p></o:p></span></font></p>
 <p class=3DMsoNormal><font size=3D2 face=3DArial><span
 lang=3DEN-GB =
 style=3D'font-size:
 10.0pt;font-family:Arial;mso-ansi-language:EN-GB'>If not does anyone =
 have any suggestions
 on how to do this?<o:p></o:p></span></font></p>
 <p class=3DMsoNormal><font size=3D2 face=3DArial><span
 lang=3DEN-GB =
 style=3D'font-size:
 10.0pt;font-family:Arial;mso-ansi-language:EN-GB'><o:p>&nbsp;</o:p></span=
   
</font></p>
     

 <p class=3DMsoNormal><font size=3D2 face=3DArial><span
 lang=3DEN-GB =
 style=3D'font-size:
 10.0pt;font-family:Arial;mso-ansi-language:EN-GB'>Thank =
 you,<o:p></o:p></span></font></p>
 <p class=3DMsoNormal><font size=3D2 face=3DArial><span
 lang=3DEN-GB =
 style=3D'font-size:
 10.0pt;font-family:Arial;mso-ansi-language:EN-GB'>Hugo<o:p></o:p></span><=
 /font></p>
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 Dr. habil. Andreas Klamt
 COSMOlogic GmbH&CoKG
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 e-mail: klamt/a\cosmologic.de
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