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

using model chemistry: MP2/aug-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/aug-cc-pVTZ
 hartrees
Energy at 0K-430.018440
Energy at 298.15K 
HF Energy-428.561298
Nuclear repulsion energy341.612319
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/aug-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 3246 3093 0.00 290.52 0.12 0.21
2 Ag 1649 1572 0.00 4.83 0.72 0.84
3 Ag 1283 1223 0.00 31.45 0.07 0.13
4 Ag 1151 1097 0.00 7.99 0.57 0.73
5 Ag 863 822 0.00 41.35 0.05 0.09
6 Ag 450 429 0.00 5.33 0.30 0.46
7 Au 926 882 0.00 0.00 0.00 0.00
8 Au 414 394 0.00 0.00 0.00 0.00
9 B1g 801 763 0.00 0.58 0.75 0.86
10 B1u 3230 3077 1.89 0.00 0.74 0.85
11 B1u 1535 1463 258.61 0.00 0.00 0.00
12 B1u 1228 1170 181.70 0.00 0.00 0.00
13 B1u 1024 976 2.67 0.00 0.00 0.00
14 B1u 752 716 58.85 0.00 0.00 0.00
15 B2g 878 837 0.00 0.05 0.75 0.86
16 B2g 597 569 0.00 1.79 0.75 0.86
17 B2g 359 342 0.00 2.49 0.75 0.86
18 B2u 3245 3092 0.19 0.00 0.12 0.22
19 B2u 1469 1400 0.41 0.00 0.00 0.00
20 B2u 1428 1361 0.28 0.00 0.00 0.00
21 B2u 1096 1044 10.91 0.00 0.00 0.00
22 B2u 348 332 4.36 0.00 0.00 0.00
23 B3g 3232 3080 0.00 108.99 0.75 0.86
24 B3g 1654 1576 0.00 6.27 0.75 0.86
25 B3g 1277 1216 0.00 1.60 0.75 0.86
26 B3g 637 607 0.00 5.04 0.75 0.86
27 B3g 440 420 0.00 0.02 0.75 0.86
28 B3u 843 803 73.95 0.00 0.00 0.00
29 B3u 512 487 18.28 0.00 0.75 0.86
30 B3u 156 149 1.66 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 18360.7 cm-1
Scaled (by 0.9529) Zero Point Vibrational Energy (zpe) 17496.0 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/aug-cc-pVTZ
ABC
0.18897 0.04758 0.03801

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.365
C2 0.000 0.000 -1.365
C3 0.000 1.215 0.697
C4 0.000 -1.215 0.697
C5 0.000 -1.215 -0.697
C6 0.000 1.215 -0.697
F7 0.000 0.000 2.714
F8 0.000 0.000 -2.714
H9 0.000 2.137 1.260
H10 0.000 -2.137 1.260
H11 0.000 -2.137 -1.260
H12 0.000 2.137 -1.260

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.73031.38641.38642.39292.39291.34884.07922.13942.13943.38473.3847
C22.73032.39292.39291.38641.38644.07921.34883.38473.38472.13942.1394
C31.38642.39292.42902.80031.39332.35473.62051.08063.39833.88062.1629
C41.38642.39292.42901.39332.80032.35473.62053.39831.08062.16293.8806
C52.39291.38642.80031.39332.42903.62052.35473.88062.16291.08063.3983
C62.39291.38641.39332.80032.42903.62052.35472.16293.88063.39831.0806
F71.34884.07922.35472.35473.62053.62055.42802.58472.58474.51184.5118
F84.07921.34883.62053.62052.35472.35475.42804.51184.51182.58472.5847
H92.13943.38471.08063.39833.88062.16292.58474.51184.27364.96102.5194
H102.13943.38473.39831.08062.16293.88062.58474.51184.27362.51944.9610
H113.38472.13943.88062.16291.08063.39834.51182.58474.96102.51944.2736
H123.38472.13942.16293.88063.39831.08064.51182.58472.51944.96104.2736

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 118.830 C1 C3 H9 119.767
C1 C4 C5 118.830 C1 C4 H10 119.767
C2 C5 C4 118.830 C2 C5 H11 119.767
C2 C6 C3 118.830 C2 C6 H12 119.767
C3 C1 C4 122.341 C3 C1 F7 118.830
C3 C6 H12 121.404 C4 C1 F7 118.830
C4 C5 H11 121.404 C5 C2 C6 122.341
C5 C2 F8 118.830 C5 C4 H10 121.404
C6 C2 F8 118.830 C6 C3 H9 121.404
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability