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

using model chemistry: MP2/STO-3G

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/STO-3G
 hartrees
Energy at 0K-423.191540
Energy at 298.15K 
HF Energy-422.801817
Nuclear repulsion energy333.767018
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/STO-3G
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 3527 3076 0.00 132.64 0.19 0.31
2 Ag 1774 1546 0.00 23.07 0.71 0.83
3 Ag 1434 1251 0.00 7.95 0.20 0.34
4 Ag 1242 1082 0.00 10.63 0.67 0.80
5 Ag 895 780 0.00 21.96 0.10 0.18
6 Ag 456 398 0.00 2.74 0.48 0.65
7 Au 1043 910 0.00 0.00 0.00 0.00
8 Au 442 386 0.00 0.00 0.72 0.84
9 B1g 902 786 0.00 5.75 0.75 0.86
10 B1u 3513 3063 1.63 0.00 0.00 0.00
11 B1u 1676 1461 142.73 0.00 0.00 0.00
12 B1u 1410 1229 33.44 0.00 0.00 0.00
13 B1u 1073 935 1.86 0.00 0.00 0.00
14 B1u 785 684 4.62 0.00 0.00 0.00
15 B2g 1016 886 0.00 2.80 0.75 0.86
16 B2g 752 655 0.00 0.00 0.75 0.86
17 B2g 389 339 0.00 1.31 0.75 0.86
18 B2u 3526 3074 16.42 0.00 0.00 0.00
19 B2u 1519 1325 0.03 0.00 0.00 0.00
20 B2u 1214 1059 8.16 0.00 0.00 0.00
21 B2u 1166 1016 4.67 0.00 0.00 0.00
22 B2u 340 296 2.64 0.00 0.00 0.00
23 B3g 3515 3065 0.00 74.67 0.75 0.86
24 B3g 1683 1468 0.00 6.14 0.75 0.86
25 B3g 1391 1213 0.00 2.50 0.75 0.86
26 B3g 675 589 0.00 5.76 0.75 0.86
27 B3g 437 381 0.00 0.53 0.75 0.86
28 B3u 876 763 36.45 0.00 0.00 0.00
29 B3u 537 468 0.61 0.00 0.00 0.00
30 B3u 164 143 0.53 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 19684.7 cm-1
Scaled (by 0.8719) Zero Point Vibrational Energy (zpe) 17163.1 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/STO-3G
ABC
0.18222 0.04505 0.03612

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/STO-3G

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.417
C2 0.000 0.000 -1.417
C3 0.000 1.236 0.706
C4 0.000 -1.236 0.706
C5 0.000 -1.236 -0.706
C6 0.000 1.236 -0.706
F7 0.000 0.000 2.790
F8 0.000 0.000 -2.790
H9 0.000 2.182 1.267
H10 0.000 -2.182 1.267
H11 0.000 -2.182 -1.267
H12 0.000 2.182 -1.267

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.83341.42581.42582.45592.45591.37294.20642.18752.18753.45923.4592
C22.83342.45592.45591.42581.42584.20641.37293.45923.45922.18752.1875
C31.42582.45592.47172.84621.41122.42293.70731.10053.46413.94672.1881
C41.42582.45592.47171.41122.84622.42293.70733.46411.10052.18813.9467
C52.45591.42582.84621.41122.47173.70732.42293.94672.18811.10053.4641
C62.45591.42581.41122.84622.47173.70732.42292.18813.94673.46411.1005
F71.37294.20642.42292.42293.70733.70735.57932.66102.66104.60654.6065
F84.20641.37293.70733.70732.42292.42295.57934.60654.60652.66102.6610
H92.18753.45921.10053.46413.94672.18812.66104.60654.36485.04712.5342
H102.18753.45923.46411.10052.18813.94672.66104.60654.36482.53425.0471
H113.45922.18753.94672.18811.10053.46414.60652.66105.04712.53424.3648
H123.45922.18752.18813.94673.46411.10054.60652.66102.53425.04714.3648

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 119.916 C1 C3 H9 119.407
C1 C4 C5 119.916 C1 C4 H10 119.407
C2 C5 C4 119.916 C2 C5 H11 119.407
C2 C6 C3 119.916 C2 C6 H12 119.407
C3 C1 C4 120.168 C3 C1 F7 119.916
C3 C6 H12 120.677 C4 C1 F7 119.916
C4 C5 H11 120.677 C5 C2 C6 120.168
C5 C2 F8 119.916 C5 C4 H10 120.677
C6 C2 F8 119.916 C6 C3 H9 120.677
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability