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: CISD/daug-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 CISD/daug-cc-pVDZ
 hartrees
Energy at 0K-277.619337
Energy at 298.15K 
HF Energy-276.984394
Nuclear repulsion energy132.265866
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 CISD/daug-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' 3250 3250 22.69      
2 A' 3217 3217 22.69      
3 A' 3151 3151 3.28      
4 A' 1525 1525 10.36      
5 A' 1497 1497 65.22      
6 A' 1431 1431 1.51      
7 A' 1204 1204 104.92      
8 A' 1197 1197 22.13      
9 A' 903 903 11.29      
10 A' 581 581 6.38      
11 A' 478 478 14.46      
12 A" 3245 3245 11.42      
13 A" 1525 1525 0.24      
14 A" 1433 1433 21.70      
15 A" 1194 1194 164.61      
16 A" 991 991 65.17      
17 A" 391 391 0.12      
18 A" 243 243 0.06      

Unscaled Zero Point Vibrational Energy (zpe) 13726.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 13726.8 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 CISD/daug-cc-pVDZ
ABC
0.31685 0.29838 0.17243

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.322 0.166 0.000
C2 -0.901 1.040 0.000
H3 1.267 0.715 0.000
F4 0.322 -0.650 1.096
F5 0.322 -0.650 -1.096
H6 -1.796 0.412 0.000
H7 -0.899 1.672 0.891
H8 -0.899 1.672 -0.891

Atom - Atom Distances (Å)
  C1 C2 H3 F4 F5 H6 H7 H8
C11.50331.09261.36661.36662.13222.13392.1339
C21.50332.19272.35662.35661.09261.09281.0928
H31.09262.19271.98921.98923.07782.53032.5303
F41.36662.35661.98922.19182.61062.63203.2914
F51.36662.35661.98922.19182.61063.29142.6320
H62.13221.09263.07782.61062.61061.78511.7851
H72.13391.09282.53032.63203.29141.78511.7819
H82.13391.09282.53033.29142.63201.78511.7819

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 109.424 C1 C2 H7 109.546
C1 C2 H8 109.546 C2 C1 H3 114.344
C2 C1 F4 110.311 C2 C1 F5 110.311
H3 C1 F4 107.452 H3 C1 F5 107.452
F4 C1 F5 106.632 H6 C2 H7 109.538
H6 C2 H8 109.538 H7 C2 H8 109.234
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability