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All results from a given calculation for C6H4F2 (1,4-difluorobenzene)

using model chemistry: MP4/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at MP4/6-311G**
 hartrees
Energy at 0K-429.805957
Energy at 298.15K-429.810493
Nuclear repulsion energy339.382393
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at MP4/6-311G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Ag 3219 3122        
2 Ag 1647 1597        
3 Ag 1279 1240        
4 Ag 1150 1115        
5 Ag 853 827        
6 Ag 445 432        
7 Au 893 866        
8 Au 409 397        
9 B1g 790 766        
10 B1u 3203 3106        
11 B1u 1535 1489        
12 B1u 1229 1192        
13 B1u 1011 980        
14 B1u 737 715        
15 B2g 848 822        
16 B2g 536 520        
17 B2g 350 339        
18 B2u 3218 3121        
19 B2u 1429 1386        
20 B2u 1340 1299        
21 B2u 1092 1059        
22 B2u 341 330        
23 B3g 3206 3109        
24 B3g 1636 1587        
25 B3g 1284 1245        
26 B3g 634 615        
27 B3g 434 420        
28 B3u 812 787        
29 B3u 496 481        
30 B3u 156 151        

Unscaled Zero Point Vibrational Energy (zpe) 18104.6 cm-1
Scaled (by 0.9697) Zero Point Vibrational Energy (zpe) 17556.0 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at MP4/6-311G**
ABC
0.18648 0.04694 0.03750

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-311G**

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.379
C2 0.000 0.000 -1.379
C3 0.000 1.223 0.702
C4 0.000 -1.223 0.702
C5 0.000 -1.223 -0.702
C6 0.000 1.223 -0.702
F7 0.000 0.000 2.731
F8 0.000 0.000 -2.731
H9 0.000 2.151 1.268
H10 0.000 -2.151 1.268
H11 0.000 -2.151 -1.268
H12 0.000 2.151 -1.268

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.75851.39781.39782.41362.41361.35174.11032.15372.15373.41073.4107
C22.75852.41362.41361.39781.39784.11031.35173.41073.41072.15372.1537
C31.39782.41362.44522.81941.40352.36913.64401.08723.42063.90632.1773
C41.39782.41362.44521.40352.81942.36913.64403.42061.08722.17733.9063
C52.41361.39782.81941.40352.44523.64402.36913.90632.17731.08723.4206
C62.41361.39781.40352.81942.44523.64402.36912.17733.90633.42061.0872
F71.35174.11032.36912.36913.64403.64405.46202.60142.60144.54054.5405
F84.11031.35173.64403.64402.36912.36915.46204.54054.54052.60142.6014
H92.15373.41071.08723.42063.90632.17732.60144.54054.30174.99342.5355
H102.15373.41073.42061.08722.17733.90632.60144.54054.30172.53554.9934
H113.41072.15373.90632.17731.08723.42064.54052.60144.99342.53554.3017
H123.41072.15372.17733.90633.42061.08724.54052.60142.53554.99344.3017

picture of 1,4-difluorobenzene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C6 118.993 C1 C3 H9 119.633
C1 C4 C5 118.993 C1 C4 H10 119.633
C2 C5 C4 118.993 C2 C5 H11 119.633
C2 C6 C3 118.993 C2 C6 H12 119.633
C3 C1 C4 122.014 C3 C1 F7 118.993
C3 C6 H12 121.373 C4 C1 F7 118.993
C4 C5 H11 121.373 C5 C2 C6 122.014
C5 C2 F8 118.993 C5 C4 H10 121.373
C6 C2 F8 118.993 C6 C3 H9 121.373
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability