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

using model chemistry: B2PLYP=FULL/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at B2PLYP=FULL/3-21G*
 hartrees
Energy at 0K-427.862260
Energy at 298.15K 
HF Energy-427.604906
Nuclear repulsion energy339.001544
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 B2PLYP=FULL/3-21G*
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 3266 3266 0.00 229.35 0.16 0.28
2 Ag 1665 1665 0.00 7.67 0.69 0.82
3 Ag 1321 1321 0.00 13.30 0.22 0.37
4 Ag 1214 1214 0.00 6.85 0.69 0.81
5 Ag 873 873 0.00 30.97 0.11 0.20
6 Ag 470 470 0.00 5.27 0.42 0.59
7 Au 1020 1020 0.00 0.00 0.00 0.00
8 Au 462 462 0.00 0.00 0.00 0.00
9 B1g 866 866 0.00 6.13 0.75 0.86
10 B1u 3250 3250 3.16 0.00 0.60 0.75
11 B1u 1584 1584 182.96 0.00 0.00 0.00
12 B1u 1294 1294 88.89 0.00 0.00 0.00
13 B1u 1053 1053 0.40 0.00 0.00 0.00
14 B1u 763 763 33.65 0.00 0.00 0.00
15 B2g 1005 1005 0.00 2.53 0.75 0.86
16 B2g 759 759 0.00 0.04 0.75 0.86
17 B2g 402 402 0.00 3.68 0.75 0.86
18 B2u 3264 3264 0.26 0.00 0.00 0.00
19 B2u 1453 1453 0.01 0.00 0.00 0.00
20 B2u 1321 1321 0.47 0.00 0.23 0.38
21 B2u 1142 1142 13.81 0.00 0.00 0.00
22 B2u 332 332 4.60 0.00 0.00 0.00
23 B3g 3251 3251 0.00 109.12 0.75 0.86
24 B3g 1625 1625 0.00 8.05 0.75 0.86
25 B3g 1355 1355 0.00 1.35 0.75 0.86
26 B3g 675 675 0.00 7.17 0.75 0.86
27 B3g 439 439 0.00 0.50 0.75 0.86
28 B3u 897 897 123.93 0.00 0.00 0.00
29 B3u 544 544 15.37 0.00 0.00 0.00
30 B3u 166 166 1.87 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 18864.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 18864.8 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 B2PLYP=FULL/3-21G*
ABC
0.19004 0.04627 0.03721

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/3-21G*

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.383
C2 0.000 0.000 -1.383
C3 0.000 1.210 0.697
C4 0.000 -1.210 0.697
C5 0.000 -1.210 -0.697
C6 0.000 1.210 -0.697
F7 0.000 0.000 2.757
F8 0.000 0.000 -2.757
H9 0.000 2.136 1.255
H10 0.000 -2.136 1.255
H11 0.000 -2.136 -1.255
H12 0.000 2.136 -1.255

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.76591.39101.39102.40682.40681.37364.13962.13962.13963.39393.3939
C22.76592.40682.40681.39101.39104.13961.37363.39393.39392.13962.1396
C31.39102.40682.42072.79371.39472.38863.65991.08033.39223.87392.1603
C41.39102.40682.42071.39472.79372.38863.65993.39221.08032.16033.8739
C52.40681.39102.79371.39472.42073.65992.38863.87392.16031.08033.3922
C62.40681.39101.39472.79372.42073.65992.38862.16033.87393.39221.0803
F71.37364.13962.38862.38863.65993.65995.51322.61102.61104.54444.5444
F84.13961.37363.65993.65992.38862.38865.51324.54444.54442.61102.6110
H92.13963.39391.08033.39223.87392.16032.61104.54444.27154.95412.5093
H102.13963.39393.39221.08032.16033.87392.61104.54444.27152.50934.9541
H113.39392.13963.87392.16031.08033.39224.54442.61104.95412.50934.2715
H123.39392.13962.16033.87393.39221.08034.54442.61102.50934.95414.2715

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 119.530 C1 C3 H9 119.413
C1 C4 C5 119.530 C1 C4 H10 119.413
C2 C5 C4 119.530 C2 C5 H11 119.413
C2 C6 C3 119.530 C2 C6 H12 119.413
C3 C1 C4 120.940 C3 C1 F7 119.530
C3 C6 H12 121.058 C4 C1 F7 119.530
C4 C5 H11 121.058 C5 C2 C6 120.940
C5 C2 F8 119.530 C5 C4 H10 121.058
C6 C2 F8 119.530 C6 C3 H9 121.058
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability