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

using model chemistry: CBS-Q

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at CBS-Q
 hartrees
Energy at 0K-430.129746
Energy at 298.15K-430.122880
HF Energy-428.393797
Nuclear repulsion energy344.091721
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 CBS-Q
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 3396 3396 0.00 259.11 0.16 0.27
2 Ag 1827 1827 0.00 4.31 0.74 0.85
3 Ag 1397 1397 0.00 19.57 0.15 0.26
4 Ag 1252 1252 0.00 8.41 0.72 0.84
5 Ag 931 931 0.00 30.40 0.09 0.17
6 Ag 487 487 0.00 4.28 0.48 0.65
7 Au 1075 1075 0.00 0.00 0.00 0.00
8 Au 474 474 0.00 0.00 0.75 0.86
9 B1g 917 917 0.00 2.53 0.75 0.86
10 B1u 3379 3379 7.98 0.00 0.00 0.00
11 B1u 1691 1691 291.95 0.00 0.00 0.00
12 B1u 1353 1353 195.70 0.00 0.00 0.00
13 B1u 1106 1106 3.48 0.00 0.00 0.00
14 B1u 802 802 66.40 0.00 0.00 0.00
15 B2g 1055 1055 0.00 1.16 0.75 0.86
16 B2g 781 781 0.00 0.04 0.75 0.86
17 B2g 422 422 0.00 4.17 0.75 0.86
18 B2u 3396 3396 4.54 0.00 0.16 0.00
19 B2u 1567 1567 0.24 0.00 0.00 0.00
20 B2u 1270 1270 0.53 0.00 0.65 0.79
21 B2u 1165 1165 18.04 0.00 0.12 0.00
22 B2u 374 374 6.45 0.00 0.00 0.00
23 B3g 3381 3381 0.00 120.15 0.75 0.86
24 B3g 1809 1809 0.00 12.84 0.75 0.86
25 B3g 1411 1411 0.00 1.21 0.75 0.86
26 B3g 697 697 0.00 7.10 0.75 0.86
27 B3g 482 482 0.00 0.05 0.75 0.86
28 B3u 956 956 98.49 0.00 0.00 0.00
29 B3u 580 580 9.93 0.00 0.00 0.00
30 B3u 180 180 2.80 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 19806.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 19806.2 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 CBS-Q
ABC
0.18749 0.04712 0.03766

See section I.F.4 to change rotational constant units
Geometric Data calculated at CBS-Q

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.363
C2 0.000 0.000 -1.363
C3 0.000 1.206 0.693
C4 0.000 -1.206 0.693
C5 0.000 -1.206 -0.693
C6 0.000 1.206 -0.693
F7 0.000 0.000 2.692
F8 0.000 0.000 -2.692
H9 0.000 2.125 1.252
H10 0.000 -2.125 1.252
H11 0.000 -2.125 -1.252
H12 0.000 2.125 -1.252

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.72671.37951.37952.38402.38401.32824.05492.12822.12823.37023.3702
C22.72672.38402.38401.37951.37954.05491.32823.37023.37022.12822.1282
C31.37952.38402.41152.78171.38652.33393.59311.07613.37773.85762.1518
C41.37952.38402.41151.38652.78172.33393.59313.37771.07612.15183.8576
C52.38401.37952.78171.38652.41153.59312.33393.85762.15181.07613.3777
C62.38401.37951.38652.78172.41153.59312.33392.15183.85763.37771.0761
F71.32824.05492.33392.33393.59313.59315.38312.56692.56694.48004.4800
F84.05491.32823.59313.59312.33392.33395.38314.48004.48002.56692.5669
H92.12823.37021.07613.37773.85762.15182.56694.48004.25074.93362.5044
H102.12823.37023.37771.07612.15183.85762.56694.48004.25072.50444.9336
H113.37022.12823.85762.15181.07613.37774.48002.56694.93362.50444.2507
H123.37022.12822.15183.85763.37771.07614.48002.56692.50444.93364.2507

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 119.063 C1 C3 H9 119.643
C1 C4 C5 119.063 C1 C4 H10 119.643
C2 C5 C4 119.063 C2 C5 H11 119.643
C2 C6 C3 119.063 C2 C6 H12 119.643
C3 C1 C4 121.874 C3 C1 F7 119.063
C3 C6 H12 121.293 C4 C1 F7 119.063
C4 C5 H11 121.293 C5 C2 C6 121.874
C5 C2 F8 119.063 C5 C4 H10 121.293
C6 C2 F8 119.063 C6 C3 H9 121.293
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability