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: MP2=FULL/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2=FULL/STO-3G
 hartrees
Energy at 0K-273.352855
Energy at 298.15K 
HF Energy-273.214270
Nuclear repulsion energy128.305046
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 MP2=FULL/STO-3G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3570 3173 0.49 22.48 0.75 0.86
2 A' 3383 3007 0.02 33.79 0.03 0.06
3 A' 3304 2937 25.45 34.65 0.37 0.54
4 A' 1711 1521 1.11 15.59 0.75 0.86
5 A' 1594 1417 6.46 3.23 0.73 0.85
6 A' 1521 1352 35.90 5.21 0.71 0.83
7 A' 1249 1111 20.05 4.47 0.64 0.78
8 A' 1209 1074 22.26 5.10 0.57 0.73
9 A' 939 835 0.39 5.77 0.21 0.34
10 A' 557 495 4.48 0.79 0.55 0.71
11 A' 450 400 6.14 1.43 0.68 0.81
12 A" 3569 3172 0.27 24.30 0.75 0.86
13 A" 1716 1525 0.07 12.74 0.75 0.86
14 A" 1537 1366 46.75 4.98 0.75 0.86
15 A" 1319 1173 15.36 5.42 0.75 0.86
16 A" 1074 954 0.68 5.31 0.75 0.86
17 A" 365 325 0.04 0.42 0.75 0.86
18 A" 167 149 0.01 0.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14617.0 cm-1
Scaled (by 0.8889) Zero Point Vibrational Energy (zpe) 12993.1 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 MP2=FULL/STO-3G
ABC
0.29959 0.27681 0.16065

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.333 0.147 0.000
C2 -0.929 1.094 0.000
H3 1.273 0.773 0.000
F4 0.333 -0.677 1.130
F5 0.333 -0.677 -1.130
H6 -1.853 0.493 0.000
H7 -0.915 1.733 0.898
H8 -0.915 1.733 -0.898

Atom - Atom Distances (Å)
  C1 C2 H3 F4 F5 H6 H7 H8
C11.57781.12961.39841.39842.21332.20882.2088
C21.57782.22592.45042.45041.10251.10241.1024
H31.12962.22592.06442.06443.13912.55282.5528
F41.39842.45042.06442.26022.72452.72353.3877
F51.39842.45042.06442.26022.72453.38772.7235
H62.21331.10253.13912.72452.72451.79621.7962
H72.20881.10242.55282.72353.38771.79621.7959
H82.20881.10242.55283.38772.72351.79621.7959

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 110.066 C1 C2 H7 109.729
C1 C2 H8 109.729 C2 C1 H3 109.488
C2 C1 F4 110.698 C2 C1 F5 110.698
H3 C1 F4 109.039 H3 C1 F5 109.039
F4 C1 F5 107.833 H6 C2 H7 109.105
H6 C2 H8 109.105 H7 C2 H8 109.086
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability