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/6-311G*

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/6-311G*
 hartrees
Energy at 0K-277.635263
Energy at 298.15K 
HF Energy-277.016976
Nuclear repulsion energy133.231308
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/6-311G*
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 3007 32.41      
2 A' 3220 2979 33.62      
3 A' 3158 2922 3.93      
4 A' 1561 1445 10.00      
5 A' 1531 1416 86.01      
6 A' 1468 1358 3.32      
7 A' 1233 1141 89.14      
8 A' 1216 1125 54.77      
9 A' 920 852 9.73      
10 A' 597 553 7.48      
11 A' 492 455 15.83      
12 A" 3246 3003 14.29      
13 A" 1562 1445 0.02      
14 A" 1488 1377 39.27      
15 A" 1242 1149 164.12      
16 A" 1022 945 53.55      
17 A" 400 370 0.03      
18 A" 256 237 0.09      

Unscaled Zero Point Vibrational Energy (zpe) 13930.5 cm-1
Scaled (by 0.9253) Zero Point Vibrational Energy (zpe) 12889.9 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 CISD/6-311G*
ABC
0.32089 0.30305 0.17483

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.323 0.160 0.000
C2 -0.900 1.028 0.000
H3 1.259 0.712 0.000
F4 0.323 -0.642 1.089
F5 0.323 -0.642 -1.089
H6 -1.784 0.396 0.000
H7 -0.911 1.657 0.886
H8 -0.911 1.657 -0.886

Atom - Atom Distances (Å)
  C1 C2 H3 F4 F5 H6 H7 H8
C11.49921.08661.35281.35282.12012.13222.1322
C21.49922.18202.33862.33861.08651.08631.0863
H31.08662.18201.97381.97383.05952.52722.5272
F41.35282.33861.97382.17852.58912.61683.2721
F51.35282.33861.97382.17852.58913.27212.6168
H62.12011.08653.05952.58912.58911.77071.7707
H72.13221.08632.52722.61683.27211.77071.7713
H82.13221.08632.52723.27212.61681.77071.7713

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 109.113 C1 C2 H7 110.086
C1 C2 H8 110.086 C2 C1 H3 114.148
C2 C1 F4 110.066 C2 C1 F5 110.066
H3 C1 F4 107.517 H3 C1 F5 107.517
F4 C1 F5 107.257 H6 C2 H7 109.156
H6 C2 H8 109.156 H7 C2 H8 109.225
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability