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: CCD/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCD/cc-pVDZ
 hartrees
Energy at 0K-277.640913
Energy at 298.15K 
HF Energy-276.960456
Nuclear repulsion energy132.051564
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/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 A' 3193 3054 14.45      
2 A' 3118 2983 51.89      
3 A' 3091 2958 4.91      
4 A' 1488 1424 18.00      
5 A' 1465 1401 76.24      
6 A' 1398 1338 2.19      
7 A' 1193 1142 100.73      
8 A' 1169 1119 24.75      
9 A' 891 852 9.15      
10 A' 578 553 6.66      
11 A' 474 453 14.34      
12 A" 3192 3054 10.86      
13 A" 1492 1427 0.45      
14 A" 1424 1362 40.95      
15 A" 1208 1156 151.73      
16 A" 983 941 36.23      
17 A" 382 365 0.01      
18 A" 242 232 0.09      

Unscaled Zero Point Vibrational Energy (zpe) 13490.6 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 12906.5 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 CCD/cc-pVDZ
ABC
0.31509 0.29831 0.17205

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.325 0.161 0.000
C2 -0.907 1.035 0.000
H3 1.271 0.732 0.000
F4 0.325 -0.647 1.099
F5 0.325 -0.647 -1.099
H6 -1.803 0.392 0.000
H7 -0.916 1.672 0.899
H8 -0.916 1.672 -0.899

Atom - Atom Distances (Å)
  C1 C2 H3 F4 F5 H6 H7 H8
C11.51061.10431.36371.36372.14082.15232.1523
C21.51062.19912.35652.35651.10271.10211.1021
H31.10432.19912.00022.00023.09272.54502.5450
F41.36372.35652.00022.19722.61062.63773.3028
F51.36372.35652.00022.19722.61063.30282.6377
H62.14081.10273.09272.61062.61061.79811.7981
H72.15231.10212.54502.63773.30281.79811.7982
H82.15231.10212.54503.30282.63771.79811.7982

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 109.009 C1 C2 H7 109.948
C1 C2 H8 109.948 C2 C1 H3 113.576
C2 C1 F4 110.032 C2 C1 F5 110.032
H3 C1 F4 107.820 H3 C1 F5 107.820
F4 C1 F5 107.338 H6 C2 H7 109.290
H6 C2 H8 109.290 H7 C2 H8 109.339
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability