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

using model chemistry: MP2=FULL/6-31G

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/6-31G
 hartrees
Energy at 0K-429.036734
Energy at 298.15K 
HF Energy-428.263631
Nuclear repulsion energy334.716269
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/6-31G
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 3244 3082 0.00 245.35 0.15 0.27
2 Ag 1637 1555 0.00 5.90 0.75 0.85
3 Ag 1249 1187 0.00 12.47 0.18 0.30
4 Ag 1198 1138 0.00 10.54 0.63 0.77
5 Ag 850 807 0.00 30.66 0.11 0.21
6 Ag 449 427 0.00 6.04 0.43 0.60
7 Au 857 814 0.00 0.00 0.00 0.00
8 Au 417 397 0.00 0.00 0.49 0.66
9 B1g 783 744 0.00 5.14 0.75 0.86
10 B1u 3227 3066 2.76 0.00 0.69 0.82
11 B1u 1542 1465 148.56 0.00 0.50 0.67
12 B1u 1225 1164 106.07 0.00 0.48 0.65
13 B1u 1043 991 3.03 0.00 0.50 0.67
14 B1u 721 685 44.75 0.00 0.00 0.00
15 B2g 826 784 0.00 1.99 0.75 0.86
16 B2g 458 435 0.00 1.16 0.75 0.86
17 B2g 354 336 0.00 2.62 0.75 0.86
18 B2u 3242 3080 0.92 0.00 0.66 0.80
19 B2u 1439 1367 0.06 0.00 0.49 0.66
20 B2u 1376 1308 0.07 0.00 0.49 0.66
21 B2u 1131 1074 11.39 0.00 0.49 0.66
22 B2u 326 310 7.98 0.00 0.50 0.67
23 B3g 3228 3067 0.00 108.95 0.75 0.86
24 B3g 1643 1561 0.00 8.48 0.75 0.86
25 B3g 1333 1267 0.00 1.55 0.75 0.86
26 B3g 651 619 0.00 7.45 0.75 0.86
27 B3g 428 407 0.00 0.59 0.75 0.86
28 B3u 781 742 121.03 0.00 0.00 0.00
29 B3u 473 450 6.65 0.00 0.00 0.00
30 B3u 154 146 3.90 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 18142.0 cm-1
Scaled (by 0.9501) Zero Point Vibrational Energy (zpe) 17236.7 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/6-31G
ABC
0.18358 0.04540 0.03640

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.375
C2 0.000 0.000 -1.375
C3 0.000 1.233 0.706
C4 0.000 -1.233 0.706
C5 0.000 -1.233 -0.706
C6 0.000 1.233 -0.706
F7 0.000 0.000 2.789
F8 0.000 0.000 -2.789
H9 0.000 2.162 1.273
H10 0.000 -2.162 1.273
H11 0.000 -2.162 -1.273
H12 0.000 2.162 -1.273

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.75041.40311.40312.41902.41901.41344.16382.16402.16403.41833.4183
C22.75042.41902.41901.40311.40314.16381.41343.41833.41832.16402.1640
C31.40312.41902.46632.84181.41172.42053.70571.08793.44173.92932.1857
C41.40312.41902.46631.41172.84182.42053.70573.44171.08792.18573.9293
C52.41901.40312.84181.41172.46633.70572.42053.92932.18571.08793.4417
C62.41901.40311.41172.84182.46633.70572.42052.18573.92933.44171.0879
F71.41344.16382.42052.42053.70573.70575.57732.64002.64004.60094.6009
F84.16381.41343.70573.70572.42052.42055.57734.60094.60092.64002.6400
H92.16403.41831.08793.44173.92932.18572.64004.60094.32315.01702.5457
H102.16403.41833.44171.08792.18573.92932.64004.60094.32312.54575.0170
H113.41832.16403.92932.18571.08793.44174.60092.64005.01702.54574.3231
H123.41832.16402.18573.92933.44171.08794.60092.64002.54575.01704.3231

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 118.493 C1 C3 H9 120.092
C1 C4 C5 118.493 C1 C4 H10 120.092
C2 C5 C4 118.493 C2 C5 H11 120.092
C2 C6 C3 118.493 C2 C6 H12 120.092
C3 C1 C4 123.015 C3 C1 F7 118.493
C3 C6 H12 121.415 C4 C1 F7 118.493
C4 C5 H11 121.415 C5 C2 C6 123.015
C5 C2 F8 118.493 C5 C4 H10 121.415
C6 C2 F8 118.493 C6 C3 H9 121.415
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability