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: MP2/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-31G**
 hartrees
Energy at 0K-277.575173
Energy at 298.15K 
HF Energy-276.949518
Nuclear repulsion energy132.062762
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 MP2/6-31G**
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' 3264 3057 10.97 40.09 0.74 0.85
2 A' 3177 2975 53.02 92.93 0.26 0.41
3 A' 3153 2953 2.76 86.55 0.02 0.04
4 A' 1547 1449 4.12 14.67 0.75 0.86
5 A' 1497 1402 74.86 2.85 0.66 0.79
6 A' 1441 1349 4.91 1.02 0.75 0.86
7 A' 1201 1124 25.67 1.88 0.10 0.18
8 A' 1187 1112 88.93 4.97 0.73 0.85
9 A' 904 846 9.20 6.47 0.22 0.35
10 A' 571 535 7.16 0.81 0.49 0.66
11 A' 468 438 12.69 0.98 0.66 0.80
12 A" 3260 3053 8.86 48.88 0.75 0.86
13 A" 1548 1450 0.04 10.79 0.75 0.86
14 A" 1451 1359 40.15 8.74 0.75 0.86
15 A" 1206 1129 125.38 3.13 0.75 0.86
16 A" 998 935 50.57 5.07 0.75 0.86
17 A" 385 361 0.04 0.22 0.75 0.86
18 A" 267 250 0.09 0.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13762.9 cm-1
Scaled (by 0.9365) Zero Point Vibrational Energy (zpe) 12888.9 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 MP2/6-31G**
ABC
0.31132 0.30165 0.17191

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.325 0.170 0.000
C2 -0.907 1.024 0.000
H3 1.260 0.731 0.000
F4 0.325 -0.643 1.107
F5 0.325 -0.643 -1.107
H6 -1.780 0.377 0.000
H7 -0.924 1.652 0.887
H8 -0.924 1.652 -0.887

Atom - Atom Distances (Å)
  C1 C2 H3 F4 F5 H6 H7 H8
C11.49951.09031.37341.37342.11542.13192.1319
C21.49952.18632.35032.35031.08701.08701.0870
H31.09032.18631.99711.99713.06032.53022.5302
F41.37342.35031.99712.21432.58802.62253.2871
F51.37342.35031.99712.21432.58803.28712.6225
H62.11541.08703.06032.58802.58801.77401.7740
H72.13191.08702.53022.62253.28711.77401.7739
H82.13191.08702.53023.28712.62251.77401.7739

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 108.690 C1 C2 H7 109.998
C1 C2 H8 109.998 C2 C1 H3 114.242
C2 C1 F4 109.709 C2 C1 F5 109.709
H3 C1 F4 107.753 H3 C1 F5 107.753
F4 C1 F5 107.436 H6 C2 H7 109.381
H6 C2 H8 109.381 H7 C2 H8 109.374
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability