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

using model chemistry: MP2/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-429.986622
Energy at 298.15K 
HF Energy-428.556979
Nuclear repulsion energy341.837339
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/cc-pVTZ
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 3255 3090 0.00 273.57 0.17 0.29
2 Ag 1664 1580 0.00 5.23 0.62 0.77
3 Ag 1299 1233 0.00 21.08 0.12 0.21
4 Ag 1160 1101 0.00 6.83 0.65 0.79
5 Ag 868 824 0.00 34.33 0.08 0.14
6 Ag 452 429 0.00 4.65 0.43 0.60
7 Au 952 904 0.00 0.00 0.00 0.00
8 Au 433 411 0.00 0.00 0.00 0.00
9 B1g 814 773 0.00 0.19 0.75 0.86
10 B1u 3239 3076 2.28 0.00 0.32 0.49
11 B1u 1550 1472 261.89 0.00 0.00 0.00
12 B1u 1246 1183 158.58 0.00 0.00 0.00
13 B1u 1028 976 1.85 0.00 0.00 0.00
14 B1u 757 719 52.84 0.00 0.00 0.00
15 B2g 923 876 0.00 0.27 0.75 0.86
16 B2g 694 659 0.00 0.67 0.75 0.86
17 B2g 382 363 0.00 3.33 0.75 0.86
18 B2u 3254 3090 0.04 0.00 0.26 0.41
19 B2u 1472 1398 1.08 0.00 0.52 0.68
20 B2u 1431 1359 0.01 0.00 0.53 0.70
21 B2u 1103 1047 12.45 0.00 0.49 0.65
22 B2u 349 331 4.06 0.00 0.00 0.00
23 B3g 3242 3078 0.00 112.41 0.75 0.86
24 B3g 1661 1577 0.00 5.70 0.75 0.86
25 B3g 1294 1229 0.00 1.76 0.75 0.86
26 B3g 640 608 0.00 6.62 0.75 0.86
27 B3g 442 420 0.00 0.04 0.75 0.86
28 B3u 849 806 80.42 0.00 0.00 0.00
29 B3u 519 493 16.83 0.00 0.00 0.00
30 B3u 160 152 1.40 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 18565.3 cm-1
Scaled (by 0.9495) Zero Point Vibrational Energy (zpe) 17627.8 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/cc-pVTZ
ABC
0.18943 0.04759 0.03804

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/cc-pVTZ

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 1.213 0.696
C4 0.000 -1.213 0.696
C5 0.000 -1.213 -0.696
C6 0.000 1.213 -0.696
F7 0.000 0.000 2.713
F8 0.000 0.000 -2.713
H9 0.000 2.135 1.257
H10 0.000 -2.135 1.257
H11 0.000 -2.135 -1.257
H12 0.000 2.135 -1.257

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.73631.38651.38652.39432.39431.34464.08092.13832.13833.38433.3843
C22.73632.39432.39431.38651.38654.08091.34463.38433.38432.13832.1383
C31.38652.39432.42572.79701.39262.35313.61841.07983.39493.87662.1606
C41.38652.39432.42571.39262.79702.35313.61843.39491.07982.16063.8766
C52.39431.38652.79701.39262.42573.61842.35313.87662.16061.07983.3949
C62.39431.38651.39262.79702.42573.61842.35312.16063.87663.39491.0798
F71.34464.08092.35312.35313.61843.61845.42552.58412.58414.50814.5081
F84.08091.34463.61843.61842.35312.35315.42554.50814.50812.58412.5841
H92.13833.38431.07983.39493.87662.16062.58414.50814.27084.95632.5150
H102.13833.38433.39491.07982.16063.87662.58414.50814.27082.51504.9563
H113.38432.13833.87662.16061.07983.39494.50812.58414.95632.51504.2708
H123.38432.13832.16063.87663.39491.07984.50812.58412.51504.95634.2708

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 118.984 C1 C3 H9 119.703
C1 C4 C5 118.984 C1 C4 H10 119.703
C2 C5 C4 118.984 C2 C5 H11 119.703
C2 C6 C3 118.984 C2 C6 H12 119.703
C3 C1 C4 122.031 C3 C1 F7 118.984
C3 C6 H12 121.312 C4 C1 F7 118.984
C4 C5 H11 121.312 C5 C2 C6 122.031
C5 C2 F8 118.984 C5 C4 H10 121.312
C6 C2 F8 118.984 C6 C3 H9 121.312
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability