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

using model chemistry: CCD/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1AG
Energy calculated at CCD/aug-cc-pVTZ
 hartrees
Energy at 0K-476.196664
Energy at 298.15K-476.200745
HF Energy-474.843016
Nuclear repulsion energy267.448281
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 CCD/aug-cc-pVTZ
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 3139 3004 0.00      
2 Ag 1518 1453 0.00      
3 Ag 1199 1148 0.00      
4 Ag 1145 1096 0.00      
5 Ag 643 615 0.00      
6 Ag 370 354 0.00      
7 Au 1389 1329 41.33      
8 Au 1210 1158 387.19      
9 Au 209 200 2.06      
10 Au 86 82 2.49      
11 Bg 1421 1360 0.00      
12 Bg 1178 1128 0.00      
13 Bg 498 476 0.00      
14 Bu 3150 3015 31.06      
15 Bu 1359 1300 28.41      
16 Bu 1179 1128 223.76      
17 Bu 556 532 10.80      
18 Bu 420 402 50.01      

Unscaled Zero Point Vibrational Energy (zpe) 10334.4 cm-1
Scaled (by 0.957) Zero Point Vibrational Energy (zpe) 9890.0 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 CCD/aug-cc-pVTZ
ABC
0.17275 0.10551 0.06935

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/aug-cc-pVTZ

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.244 0.720 0.000
C2 0.244 -0.720 0.000
H3 -1.332 0.781 0.000
H4 1.332 -0.781 0.000
F5 0.244 1.340 1.091
F6 0.244 1.340 -1.091
F7 -0.244 -1.340 1.091
F8 -0.244 -1.340 -1.091

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 F7 F8
C11.52131.08932.17711.34671.34672.33162.3316
C21.52132.17711.08932.33162.33161.34671.3467
H31.08932.17713.08841.99701.99702.62182.6218
H42.17711.08933.08842.62182.62181.99701.9970
F51.34672.33161.99702.62182.18192.72503.4909
F61.34672.33161.99702.62182.18193.49092.7250
F72.33161.34672.62181.99702.72503.49092.1819
F82.33161.34672.62181.99703.49092.72502.1819

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 111.950 C1 C2 F7 108.625
C1 C2 F8 108.625 C2 C1 H3 111.950
C2 C1 F5 108.625 C2 C1 F6 108.625
H3 C1 F5 109.677 H3 C1 F6 109.677
H4 C2 F7 109.677 H4 C2 F8 109.677
F5 C1 F6 108.204 F7 C2 F8 108.204
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability