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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-429.528950
Energy at 298.15K 
HF Energy-428.401554
Nuclear repulsion energy340.733022
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 3271 3082 0.00 245.72 0.16 0.27
2 Ag 1696 1598 0.00 7.02 0.68 0.81
3 Ag 1317 1241 0.00 13.77 0.17 0.29
4 Ag 1191 1122 0.00 8.80 0.67 0.80
5 Ag 879 829 0.00 29.92 0.10 0.18
6 Ag 456 430 0.00 4.43 0.46 0.63
7 Au 895 843 0.00 0.00 0.50 0.67
8 Au 422 398 0.00 0.00 0.50 0.67
9 B1g 806 759 0.00 5.23 0.75 0.86
10 B1u 3258 3070 2.92 0.00 0.00 0.00
11 B1u 1580 1489 247.52 0.00 0.00 0.00
12 B1u 1264 1191 143.50 0.00 0.00 0.00
13 B1u 1044 984 3.93 0.00 0.00 0.00
14 B1u 756 712 48.28 0.00 0.00 0.00
15 B2g 859 809 0.00 2.51 0.75 0.86
16 B2g 543 512 0.00 1.83 0.75 0.86
17 B2g 369 348 0.00 2.83 0.75 0.86
18 B2u 3271 3082 0.11 0.00 0.00 0.00
19 B2u 1485 1400 0.67 0.00 0.00 0.00
20 B2u 1451 1367 0.24 0.00 0.00 0.00
21 B2u 1132 1066 12.91 0.00 0.00 0.00
22 B2u 348 328 4.84 0.00 0.00 0.00
23 B3g 3260 3072 0.00 113.32 0.75 0.86
24 B3g 1687 1590 0.00 5.37 0.75 0.86
25 B3g 1322 1245 0.00 2.11 0.75 0.86
26 B3g 650 612 0.00 7.15 0.75 0.86
27 B3g 444 418 0.00 0.12 0.75 0.86
28 B3u 823 775 95.80 0.00 0.00 0.00
29 B3u 508 479 8.77 0.00 0.00 0.00
30 B3u 161 152 1.60 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 18574.1 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 17500.5 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
0.18838 0.04729 0.03780

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 1.368
C2 0.000 0.000 -1.368
C3 0.000 1.216 0.697
C4 0.000 -1.216 0.697
C5 0.000 -1.216 -0.697
C6 0.000 1.216 -0.697
F7 0.000 0.000 2.723
F8 0.000 0.000 -2.723
H9 0.000 2.142 1.263
H10 0.000 -2.142 1.263
H11 0.000 -2.142 -1.263
H12 0.000 2.142 -1.263

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.73541.38881.38882.39622.39621.35574.09112.14452.14453.39243.3924
C22.73542.39622.39621.38881.38884.09111.35573.39243.39242.14452.1445
C31.38882.39622.43222.80341.39402.36333.63011.08513.40543.88822.1676
C41.38882.39622.43221.39402.80342.36333.63013.40541.08512.16763.8882
C52.39621.38882.80341.39402.43223.63012.36333.88822.16761.08513.4054
C62.39621.38881.39402.80342.43223.63012.36332.16763.88823.40541.0851
F71.35574.09112.36332.36333.63013.63015.44672.59242.59244.52534.5253
F84.09111.35573.63013.63012.36332.36335.44674.52534.52532.59242.5924
H92.14453.39241.08513.40543.88822.16762.59244.52534.28394.97312.5259
H102.14453.39243.40541.08512.16763.88822.59244.52534.28392.52594.9731
H113.39242.14453.88822.16761.08513.40544.52532.59244.97312.52594.2839
H123.39242.14452.16763.88823.40541.08514.52532.59242.52594.97314.2839

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 118.878 C1 C3 H9 119.683
C1 C4 C5 118.878 C1 C4 H10 119.683
C2 C5 C4 118.878 C2 C5 H11 119.683
C2 C6 C3 118.878 C2 C6 H12 119.683
C3 C1 C4 122.244 C3 C1 F7 118.878
C3 C6 H12 121.439 C4 C1 F7 118.878
C4 C5 H11 121.439 C5 C2 C6 122.244
C5 C2 F8 118.878 C5 C4 H10 121.439
C6 C2 F8 118.878 C6 C3 H9 121.439
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability