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

using model chemistry: MP2=FULL/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 MP2=FULL/6-311G*
 hartrees
Energy at 0K-429.842814
Energy at 298.15K 
HF Energy-428.498920
Nuclear repulsion energy340.888880
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=FULL/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 3250 3078 0.00 262.87 0.18 0.30
2 Ag 1677 1588 0.00 6.47 0.58 0.73
3 Ag 1302 1233 0.00 18.67 0.12 0.22
4 Ag 1174 1112 0.00 5.98 0.64 0.78
5 Ag 869 823 0.00 30.95 0.10 0.17
6 Ag 454 430 0.00 4.71 0.47 0.64
7 Au 888 841 0.00 0.00 0.00 0.00
8 Au 420 398 0.00 0.00 0.00 0.00
9 B1g 799 757 0.00 0.66 0.75 0.86
10 B1u 3236 3065 3.88 0.00 0.48 0.65
11 B1u 1562 1479 268.42 0.00 0.49 0.66
12 B1u 1247 1181 155.02 0.00 0.50 0.67
13 B1u 1031 977 4.05 0.00 0.00 0.00
14 B1u 753 713 53.81 0.00 0.51 0.67
15 B2g 849 805 0.00 0.59 0.75 0.86
16 B2g 589 558 0.00 1.42 0.75 0.86
17 B2g 364 345 0.00 2.80 0.75 0.86
18 B2u 3250 3078 0.37 0.00 0.18 0.31
19 B2u 1475 1397 0.98 0.00 0.51 0.67
20 B2u 1434 1358 0.12 0.00 0.51 0.67
21 B2u 1115 1056 15.26 0.00 0.51 0.67
22 B2u 348 329 4.89 0.00 0.00 0.00
23 B3g 3239 3067 0.00 118.07 0.75 0.86
24 B3g 1665 1577 0.00 5.16 0.75 0.86
25 B3g 1307 1238 0.00 1.53 0.75 0.86
26 B3g 644 610 0.00 7.49 0.75 0.86
27 B3g 442 418 0.00 0.09 0.75 0.86
28 B3u 834 790 102.98 0.00 0.00 0.00
29 B3u 509 482 18.46 0.00 0.00 0.00
30 B3u 159 151 1.41 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 18442.7 cm-1
Scaled (by 0.9471) Zero Point Vibrational Energy (zpe) 17467.1 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=FULL/6-311G*
ABC
0.18838 0.04733 0.03783

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-311G*

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.373
C2 0.000 0.000 -1.373
C3 0.000 1.216 0.698
C4 0.000 -1.216 0.698
C5 0.000 -1.216 -0.698
C6 0.000 1.216 -0.698
F7 0.000 0.000 2.720
F8 0.000 0.000 -2.720
H9 0.000 2.143 1.262
H10 0.000 -2.143 1.262
H11 0.000 -2.143 -1.262
H12 0.000 2.143 -1.262

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.74621.39071.39072.40192.40191.34674.09292.14582.14583.39663.3966
C22.74622.40192.40191.39071.39074.09291.34673.39663.39662.14582.1458
C31.39072.40192.43202.80441.39642.35913.62791.08503.40593.88912.1685
C41.39072.40192.43201.39642.80442.35913.62793.40591.08502.16853.8891
C52.40191.39072.80441.39642.43203.62792.35913.88912.16851.08503.4059
C62.40191.39071.39642.80442.43203.62792.35912.16853.88913.40591.0850
F71.34674.09292.35912.35913.62793.62795.43962.59162.59164.52204.5220
F84.09291.34673.62793.62792.35912.35915.43964.52204.52202.59162.5916
H92.14583.39661.08503.40593.88912.16852.59164.52204.28584.97402.5244
H102.14583.39663.40591.08502.16853.88912.59164.52204.28582.52444.9740
H113.39662.14583.88912.16851.08503.40594.52202.59164.97402.52444.2858
H123.39662.14582.16853.88913.40591.08504.52202.59162.52444.97404.2858

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 119.030 C1 C3 H9 119.650
C1 C4 C5 119.030 C1 C4 H10 119.650
C2 C5 C4 119.030 C2 C5 H11 119.650
C2 C6 C3 119.030 C2 C6 H12 119.650
C3 C1 C4 121.940 C3 C1 F7 119.030
C3 C6 H12 121.320 C4 C1 F7 119.030
C4 C5 H11 121.320 C5 C2 C6 121.940
C5 C2 F8 119.030 C5 C4 H10 121.320
C6 C2 F8 119.030 C6 C3 H9 121.320
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability