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

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

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/6-31+G**
 hartrees
Energy at 0K-429.595020
Energy at 298.15K 
HF Energy-428.424547
Nuclear repulsion energy340.202915
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/6-31+G**
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 3298 3097 0.00 283.33 0.14 0.25
2 Ag 1677 1575 0.00 5.62 0.74 0.85
3 Ag 1281 1203 0.00 29.80 0.07 0.12
4 Ag 1182 1110 0.00 7.85 0.53 0.70
5 Ag 868 815 0.00 37.83 0.05 0.10
6 Ag 453 426 0.00 5.81 0.38 0.55
7 Au 897 843 0.00 0.00 0.00 0.00
8 Au 408 383 0.00 0.00 0.00 0.00
9 B1g 796 747 0.00 0.33 0.75 0.86
10 B1u 3284 3084 2.38 0.00 0.00 0.00
11 B1u 1562 1467 239.85 0.00 0.00 0.00
12 B1u 1232 1157 197.47 0.00 0.00 0.00
13 B1u 1037 974 7.25 0.00 0.00 0.00
14 B1u 745 700 62.07 0.00 0.00 0.00
15 B2g 854 802 0.00 0.11 0.75 0.86
16 B2g 445 418 0.00 3.72 0.75 0.86
17 B2g 329 309 0.00 0.98 0.75 0.86
18 B2u 3297 3097 0.00 0.00 0.75 0.86
19 B2u 1478 1388 0.60 0.00 0.00 0.00
20 B2u 1448 1360 0.11 0.00 0.00 0.00
21 B2u 1124 1056 11.60 0.00 0.00 0.00
22 B2u 345 324 5.51 0.00 0.00 0.00
23 B3g 3286 3086 0.00 113.35 0.75 0.86
24 B3g 1683 1580 0.00 7.48 0.75 0.86
25 B3g 1321 1241 0.00 1.16 0.75 0.86
26 B3g 644 605 0.00 6.67 0.75 0.86
27 B3g 441 414 0.00 0.07 0.75 0.86
28 B3u 815 766 99.57 0.00 0.00 0.00
29 B3u 494 464 15.32 0.00 0.00 0.00
30 B3u 155 145 1.95 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 18439.5 cm-1
Scaled (by 0.9392) Zero Point Vibrational Energy (zpe) 17318.4 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/6-31+G**
ABC
0.18767 0.04717 0.03769

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.364
C2 0.000 0.000 -1.364
C3 0.000 1.219 0.698
C4 0.000 -1.219 0.698
C5 0.000 -1.219 -0.698
C6 0.000 1.219 -0.698
F7 0.000 0.000 2.729
F8 0.000 0.000 -2.729
H9 0.000 2.141 1.262
H10 0.000 -2.141 1.262
H11 0.000 -2.141 -1.262
H12 0.000 2.141 -1.262

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.72791.38911.38912.39562.39561.36494.09272.14352.14353.38803.3880
C22.72792.39562.39561.38911.38914.09271.36493.38803.38802.14352.1435
C31.38912.39562.43832.81001.39662.36843.63751.08043.40713.89012.1660
C41.38912.39562.43831.39662.81002.36843.63753.40711.08042.16603.8901
C52.39561.38912.81001.39662.43833.63752.36843.89012.16601.08043.4071
C62.39561.38911.39662.81002.43833.63752.36842.16603.89013.40711.0804
F71.36494.09272.36842.36843.63753.63755.45762.59542.59544.52864.5286
F84.09271.36493.63753.63752.36842.36845.45764.52864.52862.59542.5954
H92.14353.38801.08043.40713.89012.16602.59544.52864.28204.97032.5235
H102.14353.38803.40711.08042.16603.89012.59544.52864.28202.52354.9703
H113.38802.14353.89012.16601.08043.40714.52862.59544.97032.52354.2820
H123.38802.14352.16603.89013.40711.08044.52862.59542.52354.97034.2820

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 118.634 C1 C3 H9 119.931
C1 C4 C5 118.634 C1 C4 H10 119.931
C2 C5 C4 118.634 C2 C5 H11 119.931
C2 C6 C3 118.634 C2 C6 H12 119.931
C3 C1 C4 122.732 C3 C1 F7 118.634
C3 C6 H12 121.435 C4 C1 F7 118.634
C4 C5 H11 121.435 C5 C2 C6 122.732
C5 C2 F8 118.634 C5 C4 H10 121.435
C6 C2 F8 118.634 C6 C3 H9 121.435
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability