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All results from a given calculation for CHF2CHF2 (1,1,2,2-tetrafluoroethane)

using model chemistry: MP2=FULL/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1AG
Energy calculated at MP2=FULL/6-31G
 hartrees
Energy at 0K-475.166323
Energy at 298.15K-475.170166
HF Energy-474.489970
Nuclear repulsion energy258.384541
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=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 3212 3052 0.00      
2 Ag 1482 1408 0.00      
3 Ag 1187 1128 0.00      
4 Ag 1064 1011 0.00      
5 Ag 579 551 0.00      
6 Ag 342 325 0.00      
7 Au 1382 1313 25.10      
8 Au 1113 1057 262.00      
9 Au 200 190 4.54      
10 Au 88 83 3.45      
11 Bg 1416 1345 0.00      
12 Bg 1078 1025 0.00      
13 Bg 470 446 0.00      
14 Bu 3224 3063 21.23      
15 Bu 1338 1271 24.87      
16 Bu 1071 1017 161.20      
17 Bu 486 462 17.31      
18 Bu 406 386 75.76      

Unscaled Zero Point Vibrational Energy (zpe) 10068.6 cm-1
Scaled (by 0.9501) Zero Point Vibrational Energy (zpe) 9566.2 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 MP2=FULL/6-31G
ABC
0.15604 0.10189 0.06524

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.258 0.714 0.000
C2 0.258 -0.714 0.000
H3 -1.345 0.788 0.000
H4 1.345 -0.788 0.000
F5 0.258 1.365 1.150
F6 0.258 1.365 -1.150
F7 -0.258 -1.365 1.150
F8 -0.258 -1.365 -1.150

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 F7 F8
C11.51811.08912.19671.41891.41892.37602.3760
C21.51812.19671.08912.37602.37601.41891.4189
H31.08912.19673.11752.05522.05522.67242.6724
H42.19671.08913.11752.67242.67242.05522.0552
F51.41892.37602.05522.67242.30002.77903.6073
F61.41892.37602.05522.67242.30003.60732.7790
F72.37601.41892.67242.05522.77903.60732.3000
F82.37601.41892.67242.05523.60732.77902.3000

picture of 1,1,2,2-tetrafluoroethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 113.810 C1 C2 F7 107.945
C1 C2 F8 107.945 C2 C1 H3 113.810
C2 C1 F5 107.945 C2 C1 F6 107.945
H3 C1 F5 109.357 H3 C1 F6 109.357
H4 C2 F7 109.357 H4 C2 F8 109.357
F5 C1 F6 108.281 F7 C2 F8 108.281
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability