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

using model chemistry: B2PLYP=FULL/6-31G*

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/6-31G*
 hartrees
Energy at 0K-430.317537
Energy at 298.15K 
HF Energy-429.946097
Nuclear repulsion energy340.911193
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/6-31G*
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 3261 3093 0.00      
2 Ag 1686 1599 0.00      
3 Ag 1309 1242 0.00      
4 Ag 1181 1120 0.00      
5 Ag 878 833 0.00      
6 Ag 456 433 0.00      
7 Au 935 887 0.00      
8 Au 432 410 0.00      
9 B1g 814 772 0.00      
10 B1u 3248 3080 5.74      
11 B1u 1573 1492 236.70      
12 B1u 1263 1198 159.99      
13 B1u 1039 985 2.08      
14 B1u 753 714 49.80      
15 B2g 905 858 0.00      
16 B2g 654 620 0.00      
17 B2g 380 360 0.00      
18 B2u 3261 3092 1.74      
19 B2u 1466 1390 0.31      
20 B2u 1376 1305 0.65      
21 B2u 1123 1065 12.49      
22 B2u 347 329 4.40      
23 B3g 3250 3082 0.00      
24 B3g 1676 1590 0.00      
25 B3g 1319 1251 0.00      
26 B3g 650 617 0.00      
27 B3g 446 423 0.00      
28 B3u 839 796 81.85      
29 B3u 516 490 8.55      
30 B3u 163 154 1.55      

Unscaled Zero Point Vibrational Energy (zpe) 18598.9 cm-1
Scaled (by 0.9484) Zero Point Vibrational Energy (zpe) 17639.2 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/6-31G*
ABC
0.18846 0.04734 0.03784

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-31G*

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.370
C2 0.000 0.000 -1.370
C3 0.000 1.216 0.697
C4 0.000 -1.216 0.697
C5 0.000 -1.216 -0.697
C6 0.000 1.216 -0.697
F7 0.000 0.000 2.721
F8 0.000 0.000 -2.721
H9 0.000 2.141 1.262
H10 0.000 -2.141 1.262
H11 0.000 -2.141 -1.262
H12 0.000 2.141 -1.262

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.73921.38951.38952.39802.39801.35144.09052.14342.14343.39213.3921
C22.73922.39802.39801.38951.38954.09051.35143.39213.39212.14342.1434
C31.38952.39802.43202.80341.39452.36093.62811.08343.40383.88652.1663
C41.38952.39802.43201.39452.80342.36093.62813.40381.08342.16633.8865
C52.39801.38952.80341.39452.43203.62812.36093.88652.16631.08343.4038
C62.39801.38951.39452.80342.43203.62812.36092.16633.88653.40381.0834
F71.35144.09052.36092.36093.62813.62815.44192.59072.59074.52154.5215
F84.09051.35143.62813.62812.36092.36095.44194.52154.52152.59072.5907
H92.14343.39211.08343.40383.88652.16632.59074.52154.28144.96972.5234
H102.14343.39213.40381.08342.16633.88652.59074.52154.28142.52344.9697
H113.39212.14343.88652.16631.08343.40384.52152.59074.96972.52344.2814
H123.39212.14342.16633.88653.40381.08344.52152.59072.52344.96974.2814

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 118.938 C1 C3 H9 119.662
C1 C4 C5 118.938 C1 C4 H10 119.662
C2 C5 C4 118.938 C2 C5 H11 119.662
C2 C6 C3 118.938 C2 C6 H12 119.662
C3 C1 C4 122.124 C3 C1 F7 118.938
C3 C6 H12 121.400 C4 C1 F7 118.938
C4 C5 H11 121.400 C5 C2 C6 122.124
C5 C2 F8 118.938 C5 C4 H10 121.400
C6 C2 F8 118.938 C6 C3 H9 121.400
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability