return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: CCD/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 CCD/6-31+G**
 hartrees
Energy at 0K-429.575449
Energy at 298.15K-429.580037
Nuclear repulsion energy340.392912
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 CCD/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 3297 3107 0.00      
2 Ag 1711 1612 0.00      
3 Ag 1305 1230 0.00      
4 Ag 1190 1121 0.00      
5 Ag 880 829 0.00      
6 Ag 458 431 0.00      
7 Au 916 863 0.00      
8 Au 412 388 0.00      
9 B1g 809 763 0.00      
10 B1u 3283 3094 3.75      
11 B1u 1590 1498 236.45      
12 B1u 1257 1185 186.92      
13 B1u 1047 986 6.37      
14 B1u 753 710 59.11      
15 B2g 867 817 0.00      
16 B2g 489 460 0.00      
17 B2g 353 332 0.00      
18 B2u 3297 3106 0.66      
19 B2u 1480 1394 0.63      
20 B2u 1313 1237 0.29      
21 B2u 1128 1063 10.59      
22 B2u 349 329 6.26      
23 B3g 3284 3095 0.00      
24 B3g 1709 1611 0.00      
25 B3g 1334 1257 0.00      
26 B3g 652 614 0.00      
27 B3g 447 421 0.00      
28 B3u 829 781 97.01      
29 B3u 499 470 14.20      
30 B3u 158 149 2.21      

Unscaled Zero Point Vibrational Energy (zpe) 18547.7 cm-1
Scaled (by 0.9423) Zero Point Vibrational Energy (zpe) 17477.5 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 CCD/6-31+G**
ABC
0.18769 0.04724 0.03774

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.364
C2 0.000 0.000 -1.364
C3 0.000 1.219 0.699
C4 0.000 -1.219 0.699
C5 0.000 -1.219 -0.699
C6 0.000 1.219 -0.699
F7 0.000 0.000 2.726
F8 0.000 0.000 -2.726
H9 0.000 2.141 1.262
H10 0.000 -2.141 1.262
H11 0.000 -2.141 -1.262
H12 0.000 2.141 -1.262

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.72851.38901.38902.39612.39611.36154.09002.14352.14353.38863.3886
C22.72852.39612.39611.38901.38904.09001.36153.38863.38862.14352.1435
C31.38902.39612.43822.81011.39712.36553.63481.08063.40713.89042.1667
C41.38902.39612.43821.39712.81012.36553.63483.40711.08062.16673.8904
C52.39611.38902.81011.39712.43823.63482.36553.89042.16671.08063.4071
C62.39611.38901.39712.81012.43823.63482.36552.16673.89043.40711.0806
F71.36154.09002.36552.36553.63483.63485.45152.59352.59354.52644.5264
F84.09001.36153.63483.63482.36552.36555.45154.52644.52642.59352.5935
H92.14353.38861.08063.40713.89042.16672.59354.52644.28214.97092.5245
H102.14353.38863.40711.08062.16673.89042.59354.52644.28212.52454.9709
H113.38862.14353.89042.16671.08063.40714.52642.59354.97092.52454.2821
H123.38862.14352.16673.89043.40711.08064.52642.59352.52454.97094.2821

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 118.638 C1 C3 H9 119.921
C1 C4 C5 118.638 C1 C4 H10 119.921
C2 C5 C4 118.638 C2 C5 H11 119.921
C2 C6 C3 118.638 C2 C6 H12 119.921
C3 C1 C4 122.725 C3 C1 F7 118.638
C3 C6 H12 121.441 C4 C1 F7 118.638
C4 C5 H11 121.441 C5 C2 C6 122.725
C5 C2 F8 118.638 C5 C4 H10 121.441
C6 C2 F8 118.638 C6 C3 H9 121.441
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability