<br>Yes, the x and y components are non-zero. But being an optically allowed transition, would not the vertical transition from the X state equilibrium have a non-zero Z component?<br>Thanks for the reply,<br><br><br><div class="gmail_quote">
On Tue, Feb 8, 2011 at 4:41 AM, Peter Knowles <span dir="ltr"><<a href="mailto:KnowlesPJ@cardiff.ac.uk">KnowlesPJ@cardiff.ac.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
Surely, as the A state is doublet A_1 and the X state is doublet E, the transition dipole moment is non-zero for the E part of the dipole operator, ie in the xy plane, just as is calculated?<br>
Peter<br>
<div><div></div><div class="h5">On 7 Feb 2011, at 22:46, Jayashree wrote:<br>
<br>
> Hi all,<br>
> The transition between X state and A state of methoxy free radical is dipole allowed, and I expect that the value of <2.1|DMZ|1.1> to be non-zero (in fact, a sizeable number). Instead I find it to be almost zero (of the order of 1.0e-8). Here is the input I am using and I would appreciate any comments or suggestions for carrying out the transition dipole moment calculations between the two states.<br>
><br>
> basis=6-311+G(2d,2p)<br>
> geometry={Angstrom;<br>
> c;<br>
> o,c,oc;<br>
> h1,c,h1c,o,h1co;<br>
> h2,c,h2c,o,h2co,h1,dih1;<br>
> h3,c,h3c,o,h3co,h1,dih2}<br>
> oc= 1.39486910,<br>
> h1c= 1.08983690,<br>
> h2c= 1.08983690,<br>
> h3c= 1.08983690,<br>
> h1co= 109.89813220,<br>
> h2co= 109.89813220,<br>
> h3co= 109.89813220,<br>
> dih1= 120.00000001,<br>
> dih2= 239.99999999<br>
><br>
> {uhf;occ,7,2;open,7.1;wf,17,1,1}<br>
> {casscf;maxiter,40;occ,9,3;closed,5,1;wf,17,1,1; state,1}<br>
> {rs2;option,nstati=2}<br>
> geometry={Angstrom;<br>
> c;<br>
> o,c,oc;<br>
> h1,c,h1c,o,h1co;<br>
> h2,c,h2c,o,h2co,h1,dih1;<br>
> h3,c,h3c,o,h3co,h1,dih2}<br>
> {casscf;maxiter,40;occ,9,3;closed,5,1;wf,17,2,1; state,1}<br>
> {rs2;option,nstati=2}<br>
> {casscf;maxiter,40;occ,9,3;closed,5,1;wf,17,2,1; state,1;wf,17,1,1;state,2;tran,dm}<br>
> {table,trdmx,trdmy,trdmz}<br>
> {rs2;wf,17,1,1;state,1,2;option,nstati=2}<br>
><br>
> Thanks,<br>
> --<br>
> Jayashree<br>
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<br>
</blockquote></div><br><br clear="all"><br>-- <br>Jayashree<br>