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

using model chemistry: MP2=FULL/STO-3G

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/STO-3G
 hartrees
Energy at 0K-423.194317
Energy at 298.15K 
HF Energy-422.801922
Nuclear repulsion energy333.806959
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/STO-3G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Ag 3528 3136 0.00 132.55 0.19 0.31
2 Ag 1774 1577 0.00 23.05 0.71 0.83
3 Ag 1435 1275 0.00 7.94 0.20 0.34
4 Ag 1242 1104 0.00 10.65 0.67 0.80
5 Ag 895 796 0.00 21.94 0.10 0.18
6 Ag 456 406 0.00 2.74 0.48 0.65
7 Au 1044 928 0.00 0.00 0.00 0.00
8 Au 442 393 0.00 0.00 0.72 0.84
9 B1g 902 802 0.00 5.75 0.75 0.86
10 B1u 3514 3123 1.63 0.00 0.00 0.00
11 B1u 1677 1490 142.72 0.00 0.00 0.00
12 B1u 1410 1253 33.40 0.00 0.00 0.00
13 B1u 1073 954 1.85 0.00 0.00 0.00
14 B1u 785 698 4.62 0.00 0.00 0.00
15 B2g 1016 903 0.00 2.80 0.75 0.86
16 B2g 752 668 0.00 0.00 0.75 0.86
17 B2g 389 346 0.00 1.31 0.75 0.86
18 B2u 3526 3134 16.43 0.00 0.00 0.00
19 B2u 1520 1351 0.03 0.00 0.00 0.00
20 B2u 1216 1081 8.23 0.00 0.00 0.00
21 B2u 1166 1037 4.59 0.00 0.00 0.00
22 B2u 340 302 2.64 0.00 0.00 0.00
23 B3g 3515 3125 0.00 74.61 0.75 0.86
24 B3g 1684 1497 0.00 6.13 0.75 0.86
25 B3g 1391 1237 0.00 2.51 0.75 0.86
26 B3g 676 601 0.00 5.75 0.75 0.86
27 B3g 437 388 0.00 0.53 0.75 0.86
28 B3u 876 778 36.43 0.00 0.00 0.00
29 B3u 537 477 0.61 0.00 0.00 0.00
30 B3u 164 146 0.53 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 19689.7 cm-1
Scaled (by 0.8889) Zero Point Vibrational Energy (zpe) 17502.1 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/STO-3G
ABC
0.18228 0.04505 0.03612

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/STO-3G

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.417
C2 0.000 0.000 -1.417
C3 0.000 1.236 0.706
C4 0.000 -1.236 0.706
C5 0.000 -1.236 -0.706
C6 0.000 1.236 -0.706
F7 0.000 0.000 2.789
F8 0.000 0.000 -2.789
H9 0.000 2.182 1.267
H10 0.000 -2.182 1.267
H11 0.000 -2.182 -1.267
H12 0.000 2.182 -1.267

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.83301.42561.42562.45562.45561.37294.20592.18722.18723.45873.4587
C22.83302.45562.45561.42561.42564.20591.37293.45873.45872.18722.1872
C31.42562.45562.47132.84571.41102.42273.70691.10053.46363.94612.1878
C41.42562.45562.47131.41102.84572.42273.70693.46361.10052.18783.9461
C52.45561.42562.84571.41102.47133.70692.42273.94612.18781.10053.4636
C62.45561.42561.41102.84572.47133.70692.42272.18783.94613.46361.1005
F71.37294.20592.42272.42273.70693.70695.57882.66072.66074.60604.6060
F84.20591.37293.70693.70692.42272.42275.57884.60604.60602.66072.6607
H92.18723.45871.10053.46363.94612.18782.66074.60604.36425.04652.5339
H102.18723.45873.46361.10052.18783.94612.66074.60604.36422.53395.0465
H113.45872.18723.94612.18781.10053.46364.60602.66075.04652.53394.3642
H123.45872.18722.18783.94613.46361.10054.60602.66072.53395.04654.3642

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 119.917 C1 C3 H9 119.406
C1 C4 C5 119.917 C1 C4 H10 119.406
C2 C5 C4 119.917 C2 C5 H11 119.406
C2 C6 C3 119.917 C2 C6 H12 119.406
C3 C1 C4 120.166 C3 C1 F7 119.917
C3 C6 H12 120.677 C4 C1 F7 119.917
C4 C5 H11 120.677 C5 C2 C6 120.166
C5 C2 F8 119.917 C5 C4 H10 120.677
C6 C2 F8 119.917 C6 C3 H9 120.677
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability