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

using model chemistry: CCSD(T)=FULL/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1AG
Energy calculated at CCSD(T)=FULL/cc-pVDZ
 hartrees
Energy at 0K-475.736363
Energy at 298.15K-475.740364
HF Energy-474.670575
Nuclear repulsion energy265.579565
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 CCSD(T)=FULL/cc-pVDZ
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 3122 3007        
2 Ag 1494 1439        
3 Ag 1181 1138        
4 Ag 1122 1080        
5 Ag 629 606        
6 Ag 364 351        
7 Au 1373 1322        
8 Au 1191 1147        
9 Au 203 195        
10 Au 83 80        
11 Bg 1399 1348        
12 Bg 1159 1117        
13 Bg 487 469        
14 Bu 3132 3016        
15 Bu 1322 1274        
16 Bu 1149 1107        
17 Bu 546 526        
18 Bu 407 392        

Unscaled Zero Point Vibrational Energy (zpe) 10181.2 cm-1
Scaled (by 0.9632) Zero Point Vibrational Energy (zpe) 9806.5 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 CCSD(T)=FULL/cc-pVDZ
ABC
0.16905 0.10488 0.06853

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/cc-pVDZ

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.245 0.722 0.000
C2 0.245 -0.722 0.000
H3 -1.347 0.776 0.000
H4 1.347 -0.776 0.000
F5 0.245 1.344 1.103
F6 0.245 1.344 -1.103
F7 -0.245 -1.344 1.103
F8 -0.245 -1.344 -1.103

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 F7 F8
C11.52391.10372.18591.35831.35832.34212.3421
C21.52392.18591.10372.34212.34211.35831.3583
H31.10372.18593.10972.01882.01882.63222.6322
H42.18591.10373.10972.63222.63222.01882.0188
F51.35832.34212.01882.63222.20642.73323.5126
F61.35832.34212.01882.63222.20643.51262.7332
F72.34211.35832.63222.01882.73323.51262.2064
F82.34211.35832.63222.01883.51262.73322.2064

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 111.583 C1 C2 F7 108.561
C1 C2 F8 108.561 C2 C1 H3 111.583
C2 C1 F5 108.561 C2 C1 F6 108.561
H3 C1 F5 109.729 H3 C1 F6 109.729
H4 C2 F7 109.729 H4 C2 F8 109.729
F5 C1 F6 108.615 F7 C2 F8 108.615
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability