return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: MP2/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at MP2/6-311G*
 hartrees
Energy at 0K-429.692410
Energy at 298.15K 
HF Energy-428.498577
Nuclear repulsion energy340.594098
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 MP2/6-311G*
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 3247 3086 0.00 263.61 0.18 0.30
2 Ag 1671 1588 0.00 6.44 0.58 0.73
3 Ag 1298 1234 0.00 18.67 0.13 0.22
4 Ag 1172 1114 0.00 6.00 0.64 0.78
5 Ag 867 824 0.00 31.13 0.10 0.17
6 Ag 453 430 0.00 4.74 0.47 0.64
7 Au 883 839 0.00 0.00 0.00 0.00
8 Au 418 397 0.00 0.00 0.00 0.00
9 B1g 796 756 0.00 0.66 0.75 0.86
10 B1u 3233 3073 3.94 0.00 0.48 0.65
11 B1u 1558 1480 266.31 0.00 0.49 0.66
12 B1u 1244 1182 156.67 0.00 0.50 0.67
13 B1u 1029 978 3.95 0.00 0.00 0.00
14 B1u 751 714 53.76 0.00 0.51 0.67
15 B2g 845 803 0.00 0.58 0.75 0.86
16 B2g 580 551 0.00 1.49 0.75 0.86
17 B2g 362 344 0.00 2.76 0.75 0.86
18 B2u 3247 3085 0.43 0.00 0.18 0.31
19 B2u 1470 1397 0.97 0.00 0.50 0.67
20 B2u 1430 1359 0.15 0.00 0.51 0.67
21 B2u 1113 1058 15.18 0.00 0.51 0.67
22 B2u 347 330 4.90 0.00 0.00 0.00
23 B3g 3236 3075 0.00 118.57 0.75 0.86
24 B3g 1660 1578 0.00 5.18 0.75 0.86
25 B3g 1306 1241 0.00 1.53 0.75 0.86
26 B3g 643 611 0.00 7.52 0.75 0.86
27 B3g 440 419 0.00 0.09 0.75 0.86
28 B3u 829 788 103.10 0.00 0.00 0.00
29 B3u 507 481 18.14 0.00 0.00 0.00
30 B3u 159 151 1.41 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 18396.8 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 17482.5 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 MP2/6-311G*
ABC
0.18797 0.04726 0.03777

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G*

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.374
C2 0.000 0.000 -1.374
C3 0.000 1.217 0.699
C4 0.000 -1.217 0.699
C5 0.000 -1.217 -0.699
C6 0.000 1.217 -0.699
F7 0.000 0.000 2.722
F8 0.000 0.000 -2.722
H9 0.000 2.145 1.263
H10 0.000 -2.145 1.263
H11 0.000 -2.145 -1.263
H12 0.000 2.145 -1.263

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C12.74801.39211.39212.40402.40401.34784.09582.14742.14743.39923.3992
C22.74802.40402.40401.39211.39214.09581.34783.39923.39922.14742.1474
C31.39212.40402.43492.80761.39782.36103.63091.08543.40903.89272.1702
C41.39212.40402.43491.39782.80762.36103.63093.40901.08542.17023.8927
C52.40401.39212.80761.39782.43493.63092.36103.89272.17021.08543.4090
C62.40401.39211.39782.80762.43493.63092.36102.17023.89273.40901.0854
F71.34784.09582.36102.36103.63093.63095.44362.59352.59354.52554.5255
F84.09581.34783.63093.63092.36102.36105.44364.52554.52552.59352.5935
H92.14743.39921.08543.40903.89272.17022.59354.52554.28914.97792.5265
H102.14743.39923.40901.08542.17023.89272.59354.52554.28912.52654.9779
H113.39922.14743.89272.17021.08543.40904.52552.59354.97792.52654.2891
H123.39922.14742.17023.89273.40901.08544.52552.59352.52654.97794.2891

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 119.010 C1 C3 H9 119.661
C1 C4 C5 119.010 C1 C4 H10 119.661
C2 C5 C4 119.010 C2 C5 H11 119.661
C2 C6 C3 119.010 C2 C6 H12 119.661
C3 C1 C4 121.980 C3 C1 F7 119.010
C3 C6 H12 121.329 C4 C1 F7 119.010
C4 C5 H11 121.329 C5 C2 C6 121.980
C5 C2 F8 119.010 C5 C4 H10 121.329
C6 C2 F8 119.010 C6 C3 H9 121.329
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability