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

using model chemistry: MP3/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at MP3/6-31+G**
 hartrees
Energy at 0K-429.544486
Energy at 298.15K 
HF Energy-428.409413
Nuclear repulsion energy341.150128
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 MP3/6-31+G**
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 3324 3093 0.00      
2 Ag 1729 1609 0.00      
3 Ag 1340 1247 0.00      
4 Ag 1192 1109 0.00      
5 Ag 891 830 0.00      
6 Ag 461 429 0.00      
7 Au 925 861 0.00      
8 Au 420 390 0.00      
9 B1g 822 765 0.00      
10 B1u 3310 3080 4.64      
11 B1u 1609 1497 242.15      
12 B1u 1288 1198 150.37      
13 B1u 1048 976 3.73      
14 B1u 762 709 47.55      
15 B2g 880 819 0.00      
16 B2g 528 491 0.00      
17 B2g 371 345 0.00      
18 B2u 3324 3093 1.28      
19 B2u 1491 1387 0.44      
20 B2u 1310 1219 2.13      
21 B2u 1131 1052 12.97      
22 B2u 351 327 5.19      
23 B3g 3311 3081 0.00      
24 B3g 1714 1595 0.00      
25 B3g 1333 1240 0.00      
26 B3g 657 611 0.00      
27 B3g 449 418 0.00      
28 B3u 831 773 90.28      
29 B3u 508 472 5.89      
30 B3u 163 152 1.93      

Unscaled Zero Point Vibrational Energy (zpe) 18735.7 cm-1
Scaled (by 0.9305) Zero Point Vibrational Energy (zpe) 17433.6 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 MP3/6-31+G**
ABC
0.18847 0.04744 0.03790

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31+G**

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.362
C2 0.000 0.000 -1.362
C3 0.000 1.216 0.696
C4 0.000 -1.216 0.696
C5 0.000 -1.216 -0.696
C6 0.000 1.216 -0.696
F7 0.000 0.000 2.717
F8 0.000 0.000 -2.717
H9 0.000 2.139 1.254
H10 0.000 -2.139 1.254
H11 0.000 -2.139 -1.254
H12 0.000 2.139 -1.254

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.72471.38651.38652.39112.39111.35504.07972.14162.14163.37953.3795
C22.72472.39112.39111.38651.38654.07971.35503.37953.37952.14162.1416
C31.38652.39112.43222.80271.39272.35873.62381.07833.40103.88082.1578
C41.38652.39112.43221.39272.80272.35873.62383.40101.07832.15783.8808
C52.39111.38652.80271.39272.43223.62382.35873.88082.15781.07833.4010
C62.39111.38651.39272.80272.43223.62382.35872.15783.88083.40101.0783
F71.35504.07972.35872.35873.62383.62385.43472.59142.59144.51094.5109
F84.07971.35503.62383.62382.35872.35875.43474.51094.51092.59142.5914
H92.14163.37951.07833.40103.88082.15782.59144.51094.27774.95892.5084
H102.14163.37953.40101.07832.15783.88082.59144.51094.27772.50844.9589
H113.37952.14163.88082.15781.07833.40104.51092.59144.95892.50844.2777
H123.37952.14162.15783.88083.40101.07834.51092.59142.50844.95894.2777

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 118.709 C1 C3 H9 120.136
C1 C4 C5 118.709 C1 C4 H10 120.136
C2 C5 C4 118.709 C2 C5 H11 120.136
C2 C6 C3 118.709 C2 C6 H12 120.136
C3 C1 C4 122.583 C3 C1 F7 118.709
C3 C6 H12 121.155 C4 C1 F7 118.709
C4 C5 H11 121.155 C5 C2 C6 122.583
C5 C2 F8 118.709 C5 C4 H10 121.155
C6 C2 F8 118.709 C6 C3 H9 121.155
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability