From owner-chemistry@ccl.net Mon Feb 13 10:43:01 2012 From: "Eldar Mamin yeldar443 . mail.ru" To: CCL Subject: CCL: frequencies in non-stationary point Message-Id: <-46282-120213104216-25884-klLzgQ8t/R86nwJL4UpC3w^-^server.ccl.net> X-Original-From: "Eldar Mamin" Date: Mon, 13 Feb 2012 10:42:15 -0500 Sent to CCL by: "Eldar Mamin" [yeldar443/a\mail.ru] Dear colleagues, Can anyone give me referenes on following subject: i want to describe process with external force applied on molecule, so i have obtain transition states with some bond deformated. In calculating hessian i got two or more imaginary frequencies so i cannot estimate thermodynamic functions coorectly. Hope you help. Best regards, Eldar Mamin. From owner-chemistry@ccl.net Mon Feb 13 13:35:00 2012 From: "partha sengupta anapspsmo**gmail.com" To: CCL Subject: CCL: proton transfer Message-Id: <-46283-120213114741-9168-039jAoceO7lTQNhHDj/6YA%%server.ccl.net> X-Original-From: partha sengupta Content-Type: text/plain; charset=ISO-8859-1 Date: Mon, 13 Feb 2012 22:17:34 +0530 MIME-Version: 1.0 Sent to CCL by: partha sengupta [anapspsmo]~[gmail.com] Dear colleagues,clues on the following subject: i tried to study proton transfer of an imidazole nitrogen to unsaturated aldehyde. Several attempts to have transition state result a H bond between C-H hydrogen (of CHO) with one Oxygen of carboxylic acid (COOH) group present in the side chain. Is it feasible? IRC is beyond the usual one. Hope you help. -- Dr. Partha Sarathi Sengupta Associate Professor Vivekananda Mahavidyalaya, Burdwan