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

using model chemistry: CCSD/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/cc-pVDZ
 hartrees
Energy at 0K-475.702738
Energy at 298.15K-475.706776
HF Energy-474.671141
Nuclear repulsion energy266.013994
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/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 3141 2975 0.00      
2 Ag 1511 1432 0.00      
3 Ag 1193 1130 0.00      
4 Ag 1133 1074 0.00      
5 Ag 636 603 0.00      
6 Ag 368 349 0.00      
7 Au 1385 1312 78.15      
8 Au 1209 1145 357.48      
9 Au 205 194 2.89      
10 Au 85 80 2.27      
11 Bg 1412 1337 0.00      
12 Bg 1179 1117 0.00      
13 Bg 492 466 0.00      
14 Bu 3150 2984 59.06      
15 Bu 1334 1264 42.59      
16 Bu 1165 1104 232.11      
17 Bu 552 523 10.95      
18 Bu 411 390 51.21      

Unscaled Zero Point Vibrational Energy (zpe) 10280.2 cm-1
Scaled (by 0.9473) Zero Point Vibrational Energy (zpe) 9738.5 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/cc-pVDZ
ABC
0.16986 0.10507 0.06874

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.245 0.721 0.000
C2 0.245 -0.721 0.000
H3 -1.346 0.776 0.000
H4 1.346 -0.776 0.000
F5 0.245 1.343 1.100
F6 0.245 1.343 -1.100
F7 -0.245 -1.343 1.100
F8 -0.245 -1.343 -1.100

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 F7 F8
C11.52311.10272.18441.35551.35552.33942.3394
C21.52312.18441.10272.33942.33941.35551.3555
H31.10272.18443.10742.01572.01572.62972.6297
H42.18441.10273.10742.62972.62972.01572.0157
F51.35552.33942.01572.62972.20092.73063.5072
F61.35552.33942.01572.62972.20093.50722.7306
F72.33941.35552.62972.01572.73063.50722.2009
F82.33941.35552.62972.01573.50722.73062.2009

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 111.588 C1 C2 F7 108.580
C1 C2 F8 108.580 C2 C1 H3 111.588
C2 C1 F5 108.580 C2 C1 F6 108.580
H3 C1 F5 109.736 H3 C1 F6 109.736
H4 C2 F7 109.736 H4 C2 F8 109.736
F5 C1 F6 108.556 F7 C2 F8 108.556
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability