return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH3CHF2 (Ethane, 1,1-difluoro-)

using model chemistry: CCSD(T)/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCSD(T)/Def2TZVPP
 hartrees
Energy at 0K-277.961058
Energy at 298.15K 
HF Energy-277.069053
Nuclear repulsion energy132.430737
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)/Def2TZVPP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3156 3156        
2 A' 3101 3101        
3 A' 3064 3064        
4 A' 1489 1489        
5 A' 1450 1450        
6 A' 1397 1397        
7 A' 1173 1173        
8 A' 1158 1158        
9 A' 878 878        
10 A' 571 571        
11 A' 468 468        
12 A" 3153 3153        
13 A" 1490 1490        
14 A" 1403 1403        
15 A" 1169 1169        
16 A" 965 965        
17 A" 379 379        
18 A" 227 227        

Unscaled Zero Point Vibrational Energy (zpe) 13344.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 13344.5 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)/Def2TZVPP
ABC
0.31685 0.29965 0.17279

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.324 0.165 0.000
C2 -0.904 1.035 0.000
H3 1.263 0.718 0.000
F4 0.324 -0.647 1.096
F5 0.324 -0.647 -1.096
H6 -1.790 0.400 0.000
H7 -0.909 1.664 0.889
H8 -0.909 1.664 -0.889

Atom - Atom Distances (Å)
  C1 C2 H3 F4 F5 H6 H7 H8
C11.50421.09021.36431.36432.12642.13482.1348
C21.50422.18972.35292.35291.08981.08951.0895
H31.09022.18971.98711.98713.06932.53032.5303
F41.36432.35291.98712.19242.60082.62763.2867
F51.36432.35291.98712.19242.60083.28672.6276
H62.12641.08983.06932.60082.60081.77901.7790
H72.13481.08952.53032.62763.28671.77901.7781
H82.13481.08952.53033.28672.62761.77901.7781

picture of Ethane, 1,1-difluoro- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 109.068 C1 C2 H7 109.750
C1 C2 H8 109.750 C2 C1 H3 114.184
C2 C1 F4 110.127 C2 C1 F5 110.127
H3 C1 F4 107.586 H3 C1 F5 107.586
F4 C1 F5 106.937 H6 C2 H7 109.437
H6 C2 H8 109.437 H7 C2 H8 109.384
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability