From owner-chemistry %-% at %-% ccl.net Sat May 5 12:13:00 2007 From: "sikander azam syedazam2008 . gmail.com" To: CCL Subject: CCL:G: g03 Message-Id: <-34193-070504062040-27862-Vd4FZmAF9v3BJ6giGEpnSg{}server.ccl.net> X-Original-From: "sikander azam" Content-Type: multipart/alternative; boundary="----=_Part_14783_22916490.1178270438151" Date: Fri, 4 May 2007 11:20:38 +0200 MIME-Version: 1.0 Sent to CCL by: "sikander azam" [syedazam2008|-|gmail.com] ------=_Part_14783_22916490.1178270438151 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline My problem is when I use the g03 for the geometry optimization using the command job line: # opt b3lyp/3-21g** the results are not much different from the starting structure even when I give a high energy geometry structure, the gaussian does not change it to the lowest energy structure just few changes in the bonds lengths. In other words the Gaussian does not change the geometry to the lowest energy structure, although it gaves me the energy. why? And what is the keywords available for getting the lowest energy structure?? can you help me please? ------=_Part_14783_22916490.1178270438151 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline
My problem is when I use the g03 for the geometry optimization using the command job line:
# opt b3lyp/3-21g**
the results are not much different from the starting structure even when I give a high energy geometry structure, the gaussian does not change it to the lowest energy structure just few changes in the bonds lengths. In other words the Gaussian does not change the geometry to the lowest energy structure, although it gaves me the energy.  why?
And what is the keywords available for getting the lowest energy structure??


can you help me please?
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