$CONTRL RUNTYP=OPTIMIZE $END
 $BASIS GBASIS=PM3 $END
 $SYSTEM TIMLIM=600 MWORDS=6.25 $END
 $STAPT NSTEP=200 $END
 $SCF DIIS=.T. $END
 $DATA
untitled 
C1
C      6.0     3.31378   0.24853   0.00000 
C      6.0    -2.40249   0.44184   0.00000 
C      6.0    -3.47947   0.44184   0.00000 
C      6.0     2.12634   0.35899   0.00000 
O      8.0     1.27028   1.38074   0.00000 
O      8.0     0.88367  -0.46945   0.00000 
O      8.0    -1.24267   1.51881   0.00000 
O      8.0    -1.38074  -0.69037   0.00000 
H      1.0     0.37180   1.85133   0.45559 
H      1.0    -0.54041  -1.00369  -0.24077 
H      1.0     4.08506   0.97828   0.16949 
H      1.0     4.27008  -0.10990  -0.10569 
H      1.0     3.19345  -0.96241  -0.29888 
H      1.0    -4.20716   1.21507   0.38060 
H      1.0    -4.44451   0.23217   0.13946 
H      1.0    -3.72491  -0.57769  -0.07600 
 $END