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=FULLultrafine/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 B2PLYP=FULLultrafine/6-311G**
 hartrees
Energy at 0K-430.501681
Energy at 298.15K 
HF Energy-430.058748
Nuclear repulsion energy341.247974
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=FULLultrafine/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 3236 3236 0.00 281.79 0.18 0.30
2 Ag 1663 1663 0.00 5.67 0.64 0.78
3 Ag 1285 1285 0.00 19.86 0.12 0.21
4 Ag 1163 1163 0.00 6.60 0.67 0.80
5 Ag 868 868 0.00 32.55 0.09 0.17
6 Ag 456 456 0.00 4.97 0.45 0.62
7 Au 945 945 0.00 0.00 0.00 0.00
8 Au 431 431 0.00 0.00 0.00 0.00
9 B1g 812 812 0.00 0.58 0.75 0.86
10 B1u 3222 3222 4.80 0.00 0.00 0.00
11 B1u 1548 1548 247.24 0.00 0.00 0.00
12 B1u 1238 1238 175.51 0.00 0.00 0.00
13 B1u 1027 1027 2.15 0.00 0.00 0.00
14 B1u 747 747 59.11 0.00 0.00 0.00
15 B2g 906 906 0.00 0.50 0.75 0.86
16 B2g 665 665 0.00 0.47 0.75 0.86
17 B2g 378 378 0.00 3.50 0.75 0.86
18 B2u 3235 3235 0.66 0.00 0.00 0.00
19 B2u 1447 1447 0.52 0.00 0.00 0.00
20 B2u 1356 1356 0.48 0.00 0.00 0.00
21 B2u 1107 1107 14.31 0.00 0.00 0.00
22 B2u 347 347 4.69 0.00 0.00 0.00
23 B3g 3224 3224 0.00 127.20 0.75 0.86
24 B3g 1658 1658 0.00 7.68 0.75 0.86
25 B3g 1302 1302 0.00 1.61 0.75 0.86
26 B3g 647 647 0.00 7.59 0.75 0.86
27 B3g 445 445 0.00 0.13 0.75 0.86
28 B3u 847 847 86.52 0.00 0.00 0.00
29 B3u 517 517 16.31 0.00 0.00 0.00
30 B3u 161 161 1.63 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 18439.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 18439.3 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=FULLultrafine/6-311G**
ABC
0.18902 0.04741 0.03790

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/6-311G**

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.369
C2 0.000 0.000 -1.369
C3 0.000 1.214 0.697
C4 0.000 -1.214 0.697
C5 0.000 -1.214 -0.697
C6 0.000 1.214 -0.697
F7 0.000 0.000 2.719
F8 0.000 0.000 -2.719
H9 0.000 2.138 1.261
H10 0.000 -2.138 1.261
H11 0.000 -2.138 -1.261
H12 0.000 2.138 -1.261

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.73901.38801.38802.39682.39681.34934.08832.14052.14053.38923.3892
C22.73902.39682.39681.38801.38804.08831.34933.38923.38922.14052.1405
C31.38802.39682.42842.80001.39402.35843.62521.08193.39893.88162.1645
C41.38802.39682.42841.39402.80002.35843.62523.39891.08192.16453.8816
C52.39681.38802.80001.39402.42843.62522.35843.88162.16451.08193.3989
C62.39681.38801.39402.80002.42843.62522.35842.16453.88163.39891.0819
F71.34934.08832.35842.35843.62523.62525.43762.58772.58774.51724.5172
F84.08831.34933.62523.62522.35842.35845.43764.51724.51722.58772.5877
H92.14053.38921.08193.39893.88162.16452.58774.51724.27544.96342.5212
H102.14053.38923.39891.08192.16453.88162.58774.51724.27542.52124.9634
H113.38922.14053.88162.16451.08193.39894.51722.58774.96342.52124.2754
H123.38922.14052.16453.88163.39891.08194.51722.58772.52124.96344.2754

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 118.980 C1 C3 H9 119.625
C1 C4 C5 118.980 C1 C4 H10 119.625
C2 C5 C4 118.980 C2 C5 H11 119.625
C2 C6 C3 118.980 C2 C6 H12 119.625
C3 C1 C4 122.040 C3 C1 F7 118.980
C3 C6 H12 121.395 C4 C1 F7 118.980
C4 C5 H11 121.395 C5 C2 C6 122.040
C5 C2 F8 118.980 C5 C4 H10 121.395
C6 C2 F8 118.980 C6 C3 H9 121.395
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability