hello
After the step of $aoforce ,i get the file which used as infrared analysis, but there are some problems for 1 and 2
$vibrational spectrum
# mode symmetry wave number IR intensity selection rules
# cm**(-1) km/mol IR RAMAN
1 a -208.04 0.00000 YES YES
2 a -185.28 0.00000 YES YES
3 0.00 0.00000 - -
4 0.00 0.00000 - -
5 0.00 0.00000 - -
6 0.00 0.00000 - -
7 0.00 0.13056 - -
8 0.00 5.34576 - -
May the 1 and 2 be imaginary frequency, but i don't know how to elimitate them? There is a module $vibration ,how does it works?
you can explain it in detail, many thanks