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

using model chemistry: MP2/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at MP2/aug-cc-pVDZ
 hartrees
Energy at 0K-429.656034
Energy at 298.15K 
HF Energy-428.450738
Nuclear repulsion energy338.084575
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 MP2/aug-cc-pVDZ
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 3250 3117 0.00 299.57 0.12 0.22
2 Ag 1639 1572 0.00 4.40 0.74 0.85
3 Ag 1259 1208 0.00 33.85 0.07 0.13
4 Ag 1147 1100 0.00 8.78 0.57 0.72
5 Ag 849 815 0.00 40.97 0.05 0.10
6 Ag 445 427 0.00 5.63 0.32 0.49
7 Au 922 884 0.00 0.00 0.00 0.00
8 Au 423 406 0.00 0.00 0.74 0.85
9 B1g 800 767 0.00 0.65 0.75 0.86
10 B1u 3234 3102 2.27 0.00 0.45 0.62
11 B1u 1513 1451 242.39 0.00 0.49 0.66
12 B1u 1197 1148 173.48 0.00 0.51 0.68
13 B1u 1010 969 7.92 0.00 0.49 0.66
14 B1u 735 705 62.83 0.00 0.49 0.66
15 B2g 886 850 0.00 0.02 0.75 0.86
16 B2g 642 615 0.00 1.27 0.75 0.86
17 B2g 367 352 0.00 2.77 0.75 0.86
18 B2u 3250 3116 0.00 0.00 0.20 0.34
19 B2u 1482 1421 0.30 0.00 0.53 0.69
20 B2u 1419 1361 0.61 0.00 0.46 0.63
21 B2u 1091 1047 10.48 0.00 0.46 0.63
22 B2u 344 330 4.79 0.00 0.47 0.64
23 B3g 3237 3104 0.00 113.37 0.75 0.86
24 B3g 1656 1588 0.00 6.76 0.75 0.86
25 B3g 1270 1218 0.00 1.48 0.75 0.86
26 B3g 629 604 0.00 5.51 0.75 0.86
27 B3g 437 419 0.00 0.03 0.75 0.86
28 B3u 835 801 79.30 0.00 0.00 0.00
29 B3u 500 480 18.21 0.00 0.00 0.00
30 B3u 156 150 1.79 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 18311.4 cm-1
Scaled (by 0.959) Zero Point Vibrational Energy (zpe) 17560.6 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 MP2/aug-cc-pVDZ
ABC
0.18497 0.04664 0.03725

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/aug-cc-pVDZ

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.375
C2 0.000 0.000 -1.375
C3 0.000 1.227 0.704
C4 0.000 -1.227 0.704
C5 0.000 -1.227 -0.704
C6 0.000 1.227 -0.704
F7 0.000 0.000 2.743
F8 0.000 0.000 -2.743
H9 0.000 2.160 1.272
H10 0.000 -2.160 1.272
H11 0.000 -2.160 -1.272
H12 0.000 2.160 -1.272

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.74951.39891.39892.41382.41381.36784.11732.16292.16293.41623.4162
C22.74952.41382.41381.39891.39894.11731.36783.41623.41622.16292.1629
C31.39892.41382.45492.82981.40742.37983.65831.09223.43523.92172.1845
C41.39892.41382.45491.40742.82982.37983.65833.43521.09222.18453.9217
C52.41381.39892.82981.40742.45493.65832.37983.92172.18451.09223.4352
C62.41381.39891.40742.82982.45493.65832.37982.18453.92173.43521.0922
F71.36784.11732.37982.37983.65833.65835.48512.61372.61374.55864.5586
F84.11731.36783.65833.65832.37982.37985.48514.55864.55862.61372.6137
H92.16293.41621.09223.43523.92172.18452.61374.55864.32105.01382.5431
H102.16293.41623.43521.09222.18453.92172.61374.55864.32102.54315.0138
H113.41622.16293.92172.18451.09223.43524.55862.61375.01382.54314.3210
H123.41622.16292.18453.92173.43521.09224.55862.61372.54315.01384.3210

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 118.664 C1 C3 H9 120.012
C1 C4 C5 118.664 C1 C4 H10 120.012
C2 C5 C4 118.664 C2 C5 H11 120.012
C2 C6 C3 118.664 C2 C6 H12 120.012
C3 C1 C4 122.672 C3 C1 F7 118.664
C3 C6 H12 121.324 C4 C1 F7 118.664
C4 C5 H11 121.324 C5 C2 C6 122.672
C5 C2 F8 118.664 C5 C4 H10 121.324
C6 C2 F8 118.664 C6 C3 H9 121.324
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability