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: B2PLYP=FULL/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at B2PLYP=FULL/cc-pVTZ
 hartrees
Energy at 0K-430.605724
Energy at 298.15K 
HF Energy-430.106567
Nuclear repulsion energy342.356394
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 B2PLYP=FULL/cc-pVTZ
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 3240 3097 0.00 284.03 0.17 0.29
2 Ag 1662 1588 0.00 4.74 0.68 0.81
3 Ag 1285 1228 0.00 21.67 0.11 0.20
4 Ag 1169 1117 0.00 7.02 0.65 0.79
5 Ag 872 833 0.00 34.27 0.07 0.14
6 Ag 458 438 0.00 4.98 0.42 0.59
7 Au 975 932 0.00 0.00 0.00 0.00
8 Au 441 421 0.00 0.00 0.00 0.00
9 B1g 825 789 0.00 0.23 0.75 0.86
10 B1u 3223 3081 4.05 0.00 0.73 0.84
11 B1u 1553 1484 242.00 0.00 0.00 0.00
12 B1u 1243 1188 180.19 0.00 0.00 0.00
13 B1u 1035 989 0.98 0.00 0.00 0.00
14 B1u 754 720 59.47 0.00 0.00 0.00
15 B2g 956 914 0.00 0.30 0.75 0.86
16 B2g 720 688 0.00 0.47 0.75 0.86
17 B2g 383 366 0.00 3.42 0.75 0.86
18 B2u 3239 3096 0.33 0.00 0.16 0.27
19 B2u 1451 1387 0.35 0.00 0.00 0.00
20 B2u 1360 1300 0.26 0.00 0.53 0.69
21 B2u 1113 1064 12.56 0.00 0.00 0.00
22 B2u 349 334 4.10 0.00 0.00 0.00
23 B3g 3226 3083 0.00 117.87 0.75 0.86
24 B3g 1661 1588 0.00 7.94 0.75 0.86
25 B3g 1310 1252 0.00 1.59 0.75 0.86
26 B3g 650 621 0.00 6.61 0.75 0.86
27 B3g 449 429 0.00 0.08 0.75 0.86
28 B3u 867 829 78.38 0.00 0.00 0.00
29 B3u 524 501 17.51 0.00 0.00 0.00
30 B3u 162 155 1.54 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 18575.9 cm-1
Scaled (by 0.9558) Zero Point Vibrational Energy (zpe) 17754.8 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 B2PLYP=FULL/cc-pVTZ
ABC
0.19022 0.04772 0.03815

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/cc-pVTZ

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 1.210 0.695
C4 0.000 -1.210 0.695
C5 0.000 -1.210 -0.695
C6 0.000 1.210 -0.695
F7 0.000 0.000 2.710
F8 0.000 0.000 -2.710
H9 0.000 2.131 1.255
H10 0.000 -2.131 1.255
H11 0.000 -2.131 -1.255
H12 0.000 2.131 -1.255

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.72691.38291.38292.38762.38761.34684.07382.13352.13353.37603.3760
C22.72692.38762.38761.38291.38294.07381.34683.37603.37602.13352.1335
C31.38292.38762.42082.79111.38932.35113.61371.07763.38783.86852.1562
C41.38292.38762.42081.38932.79112.35113.61373.38781.07762.15623.8685
C52.38761.38292.79111.38932.42083.61372.35113.86852.15621.07763.3878
C62.38761.38291.38932.79112.42083.61372.35112.15623.86853.38781.0776
F71.34684.07382.35112.35113.61373.61375.42062.58022.58024.50174.5017
F84.07381.34683.61373.61372.35112.35115.42064.50174.50172.58022.5802
H92.13353.37601.07763.38783.86852.15622.58024.50174.26154.94602.5104
H102.13353.37603.38781.07762.15623.86852.58024.50174.26152.51044.9460
H113.37602.13353.86852.15621.07763.38784.50172.58024.94602.51044.2615
H123.37602.13352.15623.86853.38781.07764.50172.58022.51044.94604.2615

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 118.924 C1 C3 H9 119.731
C1 C4 C5 118.924 C1 C4 H10 119.731
C2 C5 C4 118.924 C2 C5 H11 119.731
C2 C6 C3 118.924 C2 C6 H12 119.731
C3 C1 C4 122.152 C3 C1 F7 118.924
C3 C6 H12 121.345 C4 C1 F7 118.924
C4 C5 H11 121.345 C5 C2 C6 122.152
C5 C2 F8 118.924 C5 C4 H10 121.345
C6 C2 F8 118.924 C6 C3 H9 121.345
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability