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

using model chemistry: QCISD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD/3-21G*
 hartrees
Energy at 0K-275.883192
Energy at 298.15K 
HF Energy-275.441435
Nuclear repulsion energy129.787524
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 QCISD/3-21G*
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' 3141 3019 18.84      
2 A' 3090 2970 46.54      
3 A' 3065 2946 2.48      
4 A' 1566 1505 3.72      
5 A' 1491 1433 26.57      
6 A' 1465 1408 35.35      
7 A' 1196 1149 30.71      
8 A' 1136 1092 74.98      
9 A' 877 843 6.67      
10 A' 544 523 8.47      
11 A' 441 424 16.45      
12 A" 3143 3021 9.49      
13 A" 1571 1510 0.70      
14 A" 1467 1410 44.18      
15 A" 1227 1180 73.27      
16 A" 1017 977 32.50      
17 A" 353 340 0.03      
18 A" 256 246 0.15      

Unscaled Zero Point Vibrational Energy (zpe) 13523.0 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 12997.0 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 QCISD/3-21G*
ABC
0.29669 0.29479 0.16579

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.333 0.176 0.000
C2 -0.924 1.030 0.000
H3 1.253 0.767 0.000
F4 0.333 -0.649 1.136
F5 0.333 -0.649 -1.136
H6 -1.798 0.368 0.000
H7 -0.946 1.660 0.896
H8 -0.946 1.660 -0.896

Atom - Atom Distances (Å)
  C1 C2 H3 F4 F5 H6 H7 H8
C11.51961.09431.40391.40392.13932.15422.1542
C21.51962.19312.38532.38531.09631.09541.0954
H31.09432.19312.03582.03583.07732.53712.5371
F41.40392.38532.03582.27212.62022.65033.3310
F51.40392.38532.03582.27212.62023.33102.6503
H62.13931.09633.07732.62022.62021.78801.7880
H72.15421.09542.53712.65033.33101.78801.7921
H82.15421.09542.53713.33102.65031.78801.7921

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 108.650 C1 C2 H7 109.869
C1 C2 H8 109.869 C2 C1 H3 113.067
C2 C1 F4 109.289 C2 C1 F5 109.289
H3 C1 F4 108.520 H3 C1 F5 108.520
F4 C1 F5 108.032 H6 C2 H7 109.329
H6 C2 H8 109.329 H7 C2 H8 109.772
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability