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

using model chemistry: G3

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at G3
 hartrees
Energy at 0K-430.464325
Energy at 298.15K-430.457319
HF Energy-428.403703
Nuclear repulsion energy344.195930
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 HF/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 3411 3214 0.00 257.48 0.16 0.27
2 Ag 1829 1723 0.00 4.46 0.74 0.85
3 Ag 1404 1323 0.00 17.72 0.18 0.30
4 Ag 1260 1187 0.00 8.19 0.73 0.84
5 Ag 936 881 0.00 31.64 0.10 0.18
6 Ag 489 461 0.00 4.38 0.49 0.65
7 Au 1083 1020 0.00 0.00 0.00 0.00
8 Au 476 449 0.00 0.00 0.00 0.00
9 B1g 921 867 0.00 2.93 0.75 0.86
10 B1u 3396 3199 8.18 0.00 0.62 0.76
11 B1u 1700 1602 286.17 0.00 0.36 0.53
12 B1u 1365 1286 189.87 0.00 0.30 0.46
13 B1u 1111 1047 2.33 0.00 0.74 0.85
14 B1u 805 759 60.55 0.00 0.37 0.54
15 B2g 1055 994 0.00 1.58 0.75 0.86
16 B2g 768 723 0.00 0.16 0.75 0.86
17 B2g 420 395 0.00 4.74 0.75 0.86
18 B2u 3411 3213 4.71 0.00 0.72 0.84
19 B2u 1573 1482 0.15 0.00 0.38 0.56
20 B2u 1276 1202 0.66 0.00 0.71 0.83
21 B2u 1171 1103 18.87 0.00 0.61 0.75
22 B2u 375 354 6.00 0.00 0.00 0.00
23 B3g 3398 3201 0.00 118.58 0.75 0.86
24 B3g 1811 1706 0.00 12.67 0.75 0.86
25 B3g 1423 1341 0.00 1.12 0.75 0.86
26 B3g 699 659 0.00 7.09 0.75 0.86
27 B3g 484 456 0.00 0.03 0.75 0.86
28 B3u 952 897 109.96 0.00 0.00 0.00
29 B3u 574 541 8.63 0.00 0.00 0.00
30 B3u 180 169 2.59 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 19877.2 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 18728.3 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 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 118.976 C1 C3 H9 119.680
C1 C4 C5 118.976 C1 C4 H10 119.680
C2 C5 C4 118.976 C2 C5 H11 119.680
C2 C6 C3 118.976 C2 C6 H12 119.680
C3 C1 C4 122.049 C3 C1 F7 118.976
C3 C6 H12 121.344 C4 C1 F7 118.976
C4 C5 H11 121.344 C5 C2 C6 122.049
C5 C2 F8 118.976 C5 C4 H10 121.344
C6 C2 F8 118.976 C6 C3 H9 121.344
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability