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: CID/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at CID/CEP-121G
 hartrees
Energy at 0K-14.639753
Energy at 298.15K-14.645682
HF Energy-14.438125
Nuclear repulsion energy26.210514
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 CID/CEP-121G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1g 2983 2756 0.00      
2 A1g 1471 1359 0.00      
3 A1g 1006 930 0.00      
4 A1u 309 286 0.00      
5 A2u 2967 2741 78.69      
6 A2u 1459 1348 2.89      
7 Eg 3048 2817 0.00      
7 Eg 3048 2817 0.00      
8 Eg 1522 1406 0.00      
8 Eg 1522 1406 0.00      
9 Eg 1252 1157 0.00      
9 Eg 1252 1157 0.00      
10 Eu 3074 2840 109.53      
10 Eu 3074 2840 109.53      
11 Eu 1534 1417 10.31      
11 Eu 1534 1417 10.31      
12 Eu 828 765 3.08      
12 Eu 828 765 3.08      

Unscaled Zero Point Vibrational Energy (zpe) 16355.1 cm-1
Scaled (by 0.924) Zero Point Vibrational Energy (zpe) 15112.1 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 CID/CEP-121G
ABC
2.62925 0.64405 0.64405

See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/CEP-121G

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.780
C2 0.000 0.000 -0.780
H3 0.000 1.030 1.176
H4 -0.892 -0.515 1.176
H5 0.892 -0.515 1.176
H6 0.000 -1.030 -1.176
H7 -0.892 0.515 -1.176
H8 0.892 0.515 -1.176

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 H6 H7 H8
C11.56051.10301.10301.10302.21042.21042.2104
C21.56052.21042.21042.21041.10301.10301.1030
H31.10302.21041.78351.78353.12572.56692.5669
H41.10302.21041.78351.78352.56692.56693.1257
H51.10302.21041.78351.78352.56693.12572.5669
H62.21041.10303.12572.56692.56691.78351.7835
H72.21041.10302.56692.56693.12571.78351.7835
H82.21041.10302.56693.12572.56691.78351.7835

picture of Ethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 111.008 C1 C2 H7 111.008
C1 C2 H8 111.008 C2 C1 H3 111.008
C2 C1 H4 111.008 C2 C1 H5 111.008
H3 C1 H4 107.892 H3 C1 H5 107.892
H4 C1 H5 107.892 H6 C2 H7 107.892
H6 C2 H8 107.892 H7 C2 H8 107.892
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability