Thank you Seth !<br><br>However, I've found that is not so easy due to the number of occupated orbitals.<br>Finally I've found a way to do it that works....(even if maybe it is not the "proper" way...)<br>
<br>I've avoided the change of symmetry group... :).<br><br>At least, in my case, even with a low symmetry HF or low CASSCF give good orbitals (almost the same orbitals as the corresponding with high symmetry group with the same level of theory). However, to fix the orbital mixing using high CASSCF (i.e. more orbitals) I duplicated the computation : 1st. without optimizing the wavefunction neither the orbitals (<i>dont,wvfn</i>), and 2nd. optimizing everything with diabatization (<i>diab</i>) taking as reference the last "non-optimized" orbitals.<br>
<br>This form works to me....I hope this can help someone.<br><br>quim<br><br><br><div class="gmail_quote">2012/10/9 Seth Olsen <span dir="ltr"><<a href="mailto:seth.olsen@uq.edu.au" target="_blank">seth.olsen@uq.edu.au</a>></span><br>
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<div>Try to use "diab" to maximize the overlap of the output orbitals onto the reference set.<br>
<br>
Seth Olsen, Ph.D.
<div>ARC Australian Research Fellow</div>
<div>School of Mathematics & Physics</div>
<div>The University of Queensland</div>
<div>Brisbane, QLD 4072</div>
<div>Australia</div>
<div><a href="tel:%2B61%207%203365%202816" value="+61733652816" target="_blank">+61 7 3365 2816</a></div>
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On 09/10/2012, at 22:12, "Joaquim Jornet Somoza" <<a href="mailto:j.jornet.somoza@gmail.com" target="_blank">j.jornet.somoza@gmail.com</a>> wrote:<br>
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<div>Dear all,<br>
<br>
I would like to compute a energy surface for a molecule CASSCF level<br>
I started for the most symmetric geometry that belong into C2v group. I computed a small CASSCF(2,2) to get the proper orbitals and then moved to CASSCF(2,9).<br>
But when I change the geometry along the reaction coordinate the symmetry changes to C2 and the orbitals mix.<br>
<br>
I've found that it is possible using: dont,orbital --> which disable the orbital optimization, but it still mixes the orbitals.<br>
<br>
Someone has a solution?<br>
Thank you in advance.<br clear="all">
<br>
-- <br>
Joaquim Jornet Somoza<br>
Postdoctoral Researcher email: <a href="mailto:quim.jornet@gmail.com" target="_blank">
j.jornet.somoza@gmail.com</a><br>
Dynamique Réactionnelle tel: 0033 46714 3914 <br>
Institut Charles GERHARDT-<span>CNRS</span> 5253 <br>
Université Montpellier 2<br>
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</blockquote></div><br><br clear="all"><br>-- <br>Joaquim Jornet Somoza<br>Postdoctoral Researcher email: <a href="mailto:quim.jornet@gmail.com" target="_blank">j.jornet.somoza@gmail.com</a><br>Dynamique Réactionnelle tel: 0033 46714 3914
<br>Institut Charles GERHARDT-<span>CNRS</span> 5253
<br>Université Montpellier 2<br>