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 C2H6 (Ethane)

using model chemistry: CCD/cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at CCD/cc-pVQZ
 hartrees
Energy at 0K-79.682216
Energy at 298.15K-79.688138
HF Energy-79.265206
Nuclear repulsion energy42.359377
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 CCD/cc-pVQZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1g 3066 3066 0.00      
2 A1g 1447 1447 0.00      
3 A1g 1026 1026 0.00      
4 A1u 308 308 0.00      
5 A2u 3066 3066 49.85      
6 A2u 1426 1426 1.19      
7 Eg 3128 3128 0.00      
7 Eg 3128 3128 0.00      
8 Eg 1526 1526 0.00      
8 Eg 1526 1526 0.00      
9 Eg 1240 1240 0.00      
9 Eg 1240 1240 0.00      
10 Eu 3151 3151 55.53      
10 Eu 3151 3151 55.53      
11 Eu 1527 1527 8.33      
11 Eu 1527 1527 8.33      
12 Eu 831 831 2.94      
12 Eu 831 831 2.94      

Unscaled Zero Point Vibrational Energy (zpe) 16572.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16572.6 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 CCD/cc-pVQZ
ABC
2.70649 0.67091 0.67091

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/cc-pVQZ

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.762
C2 0.000 0.000 -0.762
H3 0.000 1.015 1.156
H4 -0.879 -0.507 1.156
H5 0.879 -0.507 1.156
H6 0.000 -1.015 -1.156
H7 -0.879 0.507 -1.156
H8 0.879 0.507 -1.156

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 H6 H7 H8
C11.52391.08871.08871.08872.16982.16982.1698
C21.52392.16982.16982.16981.08871.08871.0887
H31.08872.16981.75791.75793.07642.52472.5247
H41.08872.16981.75791.75792.52472.52473.0764
H51.08872.16981.75791.75792.52473.07642.5247
H62.16981.08873.07642.52472.52471.75791.7579
H72.16981.08872.52472.52473.07641.75791.7579
H82.16981.08872.52473.07642.52471.75791.7579

picture of Ethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 111.214 C1 C2 H7 111.214
C1 C2 H8 111.214 C2 C1 H3 111.214
C2 C1 H4 111.214 C2 C1 H5 111.214
H3 C1 H4 107.673 H3 C1 H5 107.673
H4 C1 H5 107.673 H6 C2 H7 107.673
H6 C2 H8 107.673 H7 C2 H8 107.673
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability