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: CCSD(T)/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 CCSD(T)/6-311G*
 hartrees
Energy at 0K-277.740048
Energy at 298.15K 
HF Energy-277.015580
Nuclear repulsion energy132.081971
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 CCSD(T)/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' 3141 3023        
2 A' 3093 2977        
3 A' 3049 2935        
4 A' 1508 1452        
5 A' 1468 1413        
6 A' 1413 1360        
7 A' 1184 1139        
8 A' 1169 1125        
9 A' 885 852        
10 A' 573 552        
11 A' 473 455        
12 A" 3138 3021        
13 A" 1509 1452        
14 A" 1430 1376        
15 A" 1186 1142        
16 A" 977 940        
17 A" 386 371        
18 A" 251 241        

Unscaled Zero Point Vibrational Energy (zpe) 13415.6 cm-1
Scaled (by 0.9626) Zero Point Vibrational Energy (zpe) 12913.9 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 CCSD(T)/6-311G*
ABC
0.31399 0.29938 0.17196

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.325 0.164 0.000
C2 -0.907 1.032 0.000
H3 1.270 0.721 0.000
F4 0.325 -0.645 1.101
F5 0.325 -0.645 -1.101
H6 -1.794 0.389 0.000
H7 -0.919 1.665 0.894
H8 -0.919 1.665 -0.894

Atom - Atom Distances (Å)
  C1 C2 H3 F4 F5 H6 H7 H8
C11.50731.09681.36691.36692.13082.14512.1451
C21.50732.19912.35502.35501.09541.09531.0953
H31.09682.19911.99331.99333.08162.54622.5462
F41.36692.35501.99332.20282.60252.63293.2969
F51.36692.35501.99332.20282.60253.29692.6329
H62.13081.09543.08162.60252.60251.78671.7867
H72.14511.09532.54622.63293.29691.78671.7874
H82.14511.09532.54623.29692.63291.78671.7874

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 108.881 C1 C2 H7 110.007
C1 C2 H8 110.007 C2 C1 H3 114.310
C2 C1 F4 109.945 C2 C1 F5 109.945
H3 C1 F4 107.505 H3 C1 F5 107.505
F4 C1 F5 107.367 H6 C2 H7 109.287
H6 C2 H8 109.287 H7 C2 H8 109.352
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability