Doublet (Mult 2) case of MP2


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(NWChem Ver. 6.6)

Hi. I'm trying to run a energy calculation negatively charged (-1) system with MP2, but couldn't find how should mark multiplicity in MP2 section.
Below is a command I just tried, it always ended up with the message,
" scf: no. of closed-shell electrons is not even!                   0".

I'd really appreciate comments to improve.
  • I'm a novice in this field, please let me know if the information is not enough...



ECHO
START
TITLE "C4A-MP2"
BASIS
 * library 6-31G*
END
CHARGE -1

MP2
END

GEOMETRY

END

TASK SCF energy