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

using model chemistry: CID/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1AG
Energy calculated at CID/3-21G*
 hartrees
Energy at 0K-472.648217
Energy at 298.15K-472.652209
HF Energy-472.074674
Nuclear repulsion energy263.775454
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 CID/3-21G*
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 3257 3031 0.00      
2 Ag 1560 1452 0.00      
3 Ag 1207 1123 0.00      
4 Ag 1144 1065 0.00      
5 Ag 620 577 0.00      
6 Ag 359 334 0.00      
7 Au 1481 1378 64.20      
8 Au 1261 1174 214.18      
9 Au 191 178 4.25      
10 Au 89 83 3.18      
11 Bg 1501 1397 0.00      
12 Bg 1221 1136 0.00      
13 Bg 493 459 0.00      
14 Bu 3271 3044 42.28      
15 Bu 1412 1314 33.23      
16 Bu 1182 1100 168.32      
17 Bu 531 494 17.75      
18 Bu 404 376 71.37      

Unscaled Zero Point Vibrational Energy (zpe) 10592.1 cm-1
Scaled (by 0.9305) Zero Point Vibrational Energy (zpe) 9855.9 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 CID/3-21G*
ABC
0.16312 0.10577 0.06792

See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/3-21G*

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.251 0.712 0.000
C2 0.251 -0.712 0.000
H3 -1.331 0.747 0.000
H4 1.331 -0.747 0.000
F5 0.251 1.339 1.124
F6 0.251 1.339 -1.124
F7 -0.251 -1.339 1.124
F8 -0.251 -1.339 -1.124

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 F7 F8
C11.50891.08152.15211.38171.38172.33872.3387
C21.50892.15211.08152.33872.33871.38171.3817
H31.08152.15213.05382.02912.02912.60502.6050
H42.15211.08153.05382.60502.60502.02912.0291
F51.38172.33872.02912.60502.24892.72443.5327
F61.38172.33872.02912.60502.24893.53272.7244
F72.33871.38172.60502.02912.72443.53272.2489
F82.33871.38172.60502.02913.53272.72442.2489

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 111.289 C1 C2 F7 107.930
C1 C2 F8 107.930 C2 C1 H3 111.289
C2 C1 F5 107.930 C2 C1 F6 107.930
H3 C1 F5 110.330 H3 C1 F6 110.330
H4 C2 F7 110.330 H4 C2 F8 110.330
F5 C1 F6 108.946 F7 C2 F8 108.946
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability