From owner-chemistry #at# ccl.net Wed May 12 11:01:00 2010 From: "Comp Chem Group compchemgroup1^gmail.com" To: CCL Subject: CCL: Binding Enthalpy in vacuum and solvent Message-Id: <-41846-100512092917-32689-kUVK9JsSt7gUrbvj1Qs8pg!=!server.ccl.net> X-Original-From: "Comp Chem Group " Date: Wed, 12 May 2010 09:29:15 -0400 Sent to CCL by: "Comp Chem Group " [compchemgroup1 a gmail.com] Dear All, By surveying on "Interaction Enthalpy" of transition metal complex in vacuum and solvent (PCM or other model), I found in all cases that the enthalpy change in vacuum is larger than that solvent. For example, if delta H in vacuum= -1000 kcal/mol, in solvent= -200 kcal/mol. Could anyone explain why? Regards, CCG1