<html dir="ltr">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css" id="owaParaStyle">P {margin-top:0;margin-bottom:0;}</style>
</head>
<body fpstyle="1" ocsi="0">
<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Dear Molpro-Team,<br>
<br>
I need a hint on a rather simple problem. Currently I am trying to get into MOLPROs capabilities of calculating anharmonic vibrational spectrum (e.g. VSCF) of isotopologues with the PROGRAMS: SURF, POLY and PESTRANS.
<br>
<br>
The specific example is to obtain the spectrum of deuterated water "HDO", by transforming the PES of a previous calculation of non-deuterated water "H<sub>2</sub>O".
<br>
<br>
I use the following input for the calculation:<br>
<br>
<font size="1">-----------------------------------------------------------------------</font><br>
<font size="1">***,h2o vibrational test<br>
memory,64,m<br>
gprint,orbitals,basis<br>
<br>
geometry={<br>
O<br>
H1,O,B1<br>
H2,O,B1,H1,A1<br>
}<br>
B1= 0.95907103 ANG<br>
A1= 103.51462331 DEGREE<br>
<br>
orient,mass<br>
mass,iso<br>
<br>
basis=vtz<br>
<br>
hf<br>
mp2<br>
optg<br>
<br>
label1<br>
{hf<br>
start,atden<br>
}<br>
mp2<br>
<br>
{surf,start1D=label1<br>
disk,where='scr',extern='h2o_1D2D3D_mp2_di_vrc.pot'}<br>
<br>
poly,dipole=1,vrc=1<br>
<br>
{pestrans,vrc=1,plot=3<br>
intensity,dipole=1<br>
mass,2,2.01410178d0}<br>
<br>
poly,dipole=1,vrc=0<br>
<br>
vscf,type=poly,dipole=1,combi=2,ubound=10000<br>
vci,type=poly,vam=3,dipole=1,combi=2,ubound=10000<br>
<br>
put,irspec,irspec.dat<br>
</font><br>
<font size="1">-----------------------------------------------------------------------</font><br>
<br>
This yields the correct results, but as you can see, i need to transform the initial PES three times! I think there should be a more sensible way of doing this?<br>
<br>
<br>
</div>
</body>
</html>