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

using model chemistry: MP2/LANL2DZ

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/LANL2DZ
 hartrees
Energy at 0K-429.056649
Energy at 298.15K 
HF Energy-428.331437
Nuclear repulsion energy331.868571
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/LANL2DZ
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 3238 3119 0.00 239.17 0.14 0.24
2 Ag 1606 1546 0.00 6.29 0.70 0.83
3 Ag 1202 1158 0.00 6.67 0.06 0.11
4 Ag 1171 1127 0.00 18.22 0.43 0.61
5 Ag 815 785 0.00 37.56 0.12 0.22
6 Ag 435 419 0.00 7.62 0.48 0.64
7 Au 853 822 0.00 0.00 0.75 0.86
8 Au 413 398 0.00 0.00 0.00 0.00
9 B1g 781 752 0.00 0.31 0.75 0.86
10 B1u 3214 3096 3.64 0.00 0.00 0.00
11 B1u 1508 1452 154.76 0.00 0.00 0.00
12 B1u 1167 1124 128.77 0.00 0.00 0.00
13 B1u 1022 984 5.97 0.00 0.00 0.00
14 B1u 692 667 56.97 0.00 0.00 0.00
15 B2g 839 808 0.00 0.09 0.75 0.86
16 B2g 602 580 0.00 0.00 0.75 0.86
17 B2g 354 341 0.00 3.95 0.75 0.86
18 B2u 3236 3117 2.30 0.00 0.00 0.00
19 B2u 1407 1355 0.20 0.00 0.00 0.00
20 B2u 1357 1307 0.00 0.00 0.00 0.00
21 B2u 1110 1069 14.58 0.00 0.00 0.00
22 B2u 316 304 8.92 0.00 0.00 0.00
23 B3g 3216 3097 0.00 86.40 0.75 0.86
24 B3g 1620 1560 0.00 11.33 0.75 0.86
25 B3g 1320 1272 0.00 0.52 0.75 0.86
26 B3g 637 613 0.00 10.13 0.75 0.86
27 B3g 414 398 0.00 0.39 0.75 0.86
28 B3u 819 788 122.96 0.00 0.00 0.00
29 B3u 469 451 21.30 0.00 0.00 0.00
30 B3u 150 144 4.07 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 17990.3 cm-1
Scaled (by 0.9631) Zero Point Vibrational Energy (zpe) 17326.5 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/LANL2DZ
ABC
0.17982 0.04472 0.03581

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/LANL2DZ

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.382
C2 0.000 0.000 -1.382
C3 0.000 1.247 0.713
C4 0.000 -1.247 0.713
C5 0.000 -1.247 -0.713
C6 0.000 1.247 -0.713
F7 0.000 0.000 2.811
F8 0.000 0.000 -2.811
H9 0.000 2.177 1.284
H10 0.000 -2.177 1.284
H11 0.000 -2.177 -1.284
H12 0.000 2.177 -1.284

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.76331.41521.41522.43732.43731.42894.19232.17912.17913.44193.4419
C22.76332.43732.43731.41521.41524.19231.42893.44193.44192.17912.1791
C31.41522.43732.49402.87241.42502.44073.73731.09173.47143.96372.2027
C41.41522.43732.49401.42502.87242.44073.73733.47141.09172.20273.9637
C52.43731.41522.87241.42502.49403.73732.44073.96372.20271.09173.4714
C62.43731.41521.42502.87242.49403.73732.44072.20273.96373.47141.0917
F71.42894.19232.44072.44073.73733.73735.62122.65872.65874.63764.6376
F84.19231.42893.73733.73732.44072.44075.62124.63764.63762.65872.6587
H92.17913.44191.09173.47143.96372.20272.65874.63764.35395.05512.5686
H102.17913.44193.47141.09172.20273.96372.65874.63764.35392.56865.0551
H113.44192.17913.96372.20271.09173.47144.63762.65875.05512.56864.3539
H123.44192.17912.20273.96373.47141.09174.63762.65872.56865.05514.3539

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 118.219 C1 C3 H9 120.196
C1 C4 C5 118.219 C1 C4 H10 120.196
C2 C5 C4 118.219 C2 C5 H11 120.196
C2 C6 C3 118.219 C2 C6 H12 120.196
C3 C1 C4 123.563 C3 C1 F7 118.219
C3 C6 H12 121.585 C4 C1 F7 118.219
C4 C5 H11 121.585 C5 C2 C6 123.563
C5 C2 F8 118.219 C5 C4 H10 121.585
C6 C2 F8 118.219 C6 C3 H9 121.585
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability