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

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

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/6-31+G**
 hartrees
Energy at 0K-430.361093
Energy at 298.15K 
HF Energy-429.974916
Nuclear repulsion energy340.338991
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/6-31+G**
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 3263 3104 0.00      
2 Ag 1665 1583 0.00      
3 Ag 1271 1209 0.00      
4 Ag 1173 1115 0.00      
5 Ag 867 825 0.00      
6 Ag 454 432 0.00      
7 Au 943 897 0.00      
8 Au 427 406 0.00      
9 B1g 809 770 0.00      
10 B1u 3250 3091 3.62      
11 B1u 1553 1476 241.75      
12 B1u 1226 1166 210.28      
13 B1u 1034 983 4.79      
14 B1u 742 706 66.77      
15 B2g 906 861 0.00      
16 B2g 632 601 0.00      
17 B2g 370 351 0.00      
18 B2u 3263 3103 0.16      
19 B2u 1454 1383 0.61      
20 B2u 1375 1308 0.01      
21 B2u 1116 1062 11.52      
22 B2u 345 328 5.29      
23 B3g 3252 3092 0.00      
24 B3g 1671 1589 0.00      
25 B3g 1316 1251 0.00      
26 B3g 646 615 0.00      
27 B3g 444 422 0.00      
28 B3u 841 800 91.17      
29 B3u 509 484 17.27      
30 B3u 158 151 2.01      

Unscaled Zero Point Vibrational Energy (zpe) 18486.9 cm-1
Scaled (by 0.951) Zero Point Vibrational Energy (zpe) 17581.0 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 B2PLYP=FULL/6-31+G**
ABC
0.18772 0.04722 0.03773

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

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 1.219 0.699
C4 0.000 -1.219 0.699
C5 0.000 -1.219 -0.699
C6 0.000 1.219 -0.699
F7 0.000 0.000 2.726
F8 0.000 0.000 -2.726
H9 0.000 2.142 1.262
H10 0.000 -2.142 1.262
H11 0.000 -2.142 -1.262
H12 0.000 2.142 -1.262

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.73041.38921.38922.39682.39681.36124.09172.14472.14473.39003.3900
C22.73042.39682.39681.38921.38924.09171.36123.39003.39002.14472.1447
C31.38922.39682.43762.80951.39702.36603.63541.08183.40793.89112.1672
C41.38922.39682.43761.39702.80952.36603.63543.40791.08182.16723.8911
C52.39681.38922.80951.39702.43763.63542.36603.89112.16721.08183.4079
C62.39681.38921.39702.80952.43763.63542.36602.16723.89113.40791.0818
F71.36124.09172.36602.36603.63543.63545.45292.59492.59494.52754.5275
F84.09171.36123.63543.63542.36602.36605.45294.52754.52752.59492.5949
H92.14473.39001.08183.40793.89112.16722.59494.52754.28444.97272.5243
H102.14473.39003.40791.08182.16723.89112.59494.52754.28442.52434.9727
H113.39002.14473.89112.16721.08183.40794.52752.59494.97272.52434.2844
H123.39002.14472.16723.89113.40791.08184.52752.59492.52434.97274.2844

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 118.679 C1 C3 H9 119.923
C1 C4 C5 118.679 C1 C4 H10 119.923
C2 C5 C4 118.679 C2 C5 H11 119.923
C2 C6 C3 118.679 C2 C6 H12 119.923
C3 C1 C4 122.641 C3 C1 F7 118.679
C3 C6 H12 121.398 C4 C1 F7 118.679
C4 C5 H11 121.398 C5 C2 C6 122.641
C5 C2 F8 118.679 C5 C4 H10 121.398
C6 C2 F8 118.679 C6 C3 H9 121.398
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability