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All results from a given calculation for C2H6 (Ethane)

using model chemistry: QCISD(TQ)/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at QCISD(TQ)/CEP-31G
 hartrees
Energy at 0K-14.636992
Energy at 298.15K-14.642868
HF Energy-14.429576
Nuclear repulsion energy25.877942
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(TQ)/CEP-31G
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 2970 2970        
2 A1g 1437 1437        
3 A1g 985 985        
4 A1u 299 299        
5 A2u 2962 2962        
6 A2u 1423 1423        
7 Eg 3033 3033        
7 Eg 3033 3033        
8 Eg 1491 1491        
8 Eg 1490 1490        
9 Eg 1223 1223        
9 Eg 1223 1223        
10 Eu 3058 3058        
10 Eu 3058 3058        
11 Eu 1495 1495        
11 Eu 1494 1494        
12 Eu 819 819        
12 Eu 819 819        

Unscaled Zero Point Vibrational Energy (zpe) 16155.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16155.2 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(TQ)/CEP-31G
ABC
2.55557 0.62893 0.62893

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(TQ)/CEP-31G

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.789
C2 0.000 0.000 -0.789
H3 0.000 1.044 1.189
H4 -0.905 -0.522 1.189
H5 0.905 -0.522 1.189
H6 0.000 -1.044 -1.189
H7 -0.905 0.522 -1.189
H8 0.905 0.522 -1.189

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 H6 H7 H8
C11.57871.11841.11841.11842.23732.23732.2373
C21.57872.23732.23732.23731.11841.11841.1184
H31.11842.23731.80901.80903.16562.59772.5977
H41.11842.23731.80901.80902.59772.59773.1656
H51.11842.23731.80901.80902.59773.16562.5977
H62.23731.11843.16562.59772.59771.80901.8090
H72.23731.11842.59772.59773.16561.80901.8090
H82.23731.11842.59773.16562.59771.80901.8090

picture of Ethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 110.951 C1 C2 H7 110.951
C1 C2 H8 110.951 C2 C1 H3 110.951
C2 C1 H4 110.951 C2 C1 H5 110.951
H3 C1 H4 107.951 H3 C1 H5 107.951
H4 C1 H5 107.951 H6 C2 H7 107.951
H6 C2 H8 107.951 H7 C2 H8 107.951
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability