## Firefly and PC GAMESS-related discussion club

Learn how to ask questions correctly

** LARGE difference (0.03 Hartree) in SCF energy for the same geometry in D3 and C2 symmetry **
GrEv

grevgen13@gmail.com

Hello,I encountered a large difference between virtually the same SCF calculations that

differ in symmetry "used" in the calculations, namely D3 and C2. For the case of D3

symmetry E_scf is -899.1850525784 and for C2 E_scf is -899.2179077371 (difference is

0.03 Hartree!!!). As can be easily guessed the correct energy is in the case of C2

symmetry (checked with Gaussian and Turbomole). I wonder what went wrong in the

case of D3? The outputs of both calculations are attached.

Thanks!

Best regards,

Evgeniy

| This message contains the 3410 kb attachment
[ **ff_outputs.tgz** ] two ff outputs of scf calculation using D3 and C2 symmetry |

*[ This message was edited on Thu Jun 22 '17 at 2:50pm by the author ]*

Thu Jun 22 '17 2:50pm

This message read **182** times