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 (orthodifluorobenzene)

using model chemistry: MP2/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/CEP-121G
 hartrees
Energy at 0K-83.559801
Energy at 298.15K 
Nuclear repulsion energy172.946464
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/CEP-121G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3182 3106 3.70      
2 A1 3161 3086 15.31      
3 A1 1601 1562 10.86      
4 A1 1489 1453 99.57      
5 A1 1342 1310 0.00      
6 A1 1228 1198 82.63      
7 A1 1183 1155 4.01      
8 A1 1011 987 10.34      
9 A1 716 699 31.02      
10 A1 558 544 7.52      
11 A1 263 257 0.75      
12 A2 742 724 0.00      
13 A2 701 684 0.00      
14 A2 471 460 0.00      
15 A2 166 162 0.00      
16 A2 779i 761i 0.00      
17 B1 732 714 99.43      
18 B1 704 687 19.87      
19 B1 396 387 2.16      
20 B1 259 253 0.12      
21 B2 3177 3101 6.85      
22 B2 3145 3070 2.93      
23 B2 1587 1549 4.10      
24 B2 1445 1411 8.47      
25 B2 1272 1241 0.00      
26 B2 1158 1131 9.77      
27 B2 1079 1053 37.75      
28 B2 822 803 19.56      
29 B2 517 505 4.64      
30 B2 409 399 0.65      

Unscaled Zero Point Vibrational Energy (zpe) 16868.7 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 16463.9 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/CEP-121G
ABC
0.10176 0.06970 0.04137

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.713 -0.544
C2 0.000 -0.713 -0.544
C3 0.000 -1.431 0.684
C4 0.000 -0.715 1.919
C5 0.000 0.715 1.919
C6 0.000 1.431 0.684
F7 0.000 1.405 -1.763
F8 0.000 -1.405 -1.763
H9 0.000 -2.522 0.652
H10 0.000 -1.267 2.862
H11 0.000 1.267 2.862
H12 0.000 2.522 0.652

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 F7 F8 H9 H10 H11 H12
C11.42702.47112.84722.46291.42211.40112.44383.45003.93963.45052.1688
C21.42701.42212.46292.84722.47112.44381.40112.16883.45053.93963.4500
C32.47111.42211.42762.47592.86193.74522.44671.09202.18423.46703.9535
C42.84722.46291.42761.42992.47594.24823.74562.20711.09242.19443.4764
C52.46292.84722.47591.42991.42763.74564.24823.47642.19441.09242.2071
C61.42212.47112.86192.47591.42762.44673.74523.95353.46702.18421.0920
F71.40112.44383.74524.24823.74562.44672.80954.61035.34064.62662.6611
F82.44381.40112.44673.74564.24823.74522.80952.66114.62665.34064.6103
H93.45002.16881.09202.20713.47643.95354.61032.66112.54164.38625.0449
H103.93963.45052.18421.09242.19443.46705.34064.62662.54162.53304.3862
H113.45053.93963.46702.19441.09242.18424.62665.34064.38622.53302.5416
H122.16883.45003.95353.47642.20711.09202.66114.61035.04494.38622.5416

picture of orthodifluorobenzene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 120.296 C1 C2 F8 119.564
C1 C6 C5 119.601 C1 C6 H12 118.638
C2 C1 C6 120.296 C2 C1 F7 119.564
C2 C3 C4 119.601 C2 C3 H9 118.638
C3 C2 F8 120.139 C3 C4 C5 120.102
C3 C4 H10 119.574 C4 C3 H9 121.761
C4 C5 C6 120.102 C4 C5 H11 120.324
C5 C4 H10 120.324 C5 C6 H12 121.761
C6 C1 F7 120.139 C6 C5 H11 119.574
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability