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All results from a given calculation for C2H6 (Ethane)

using model chemistry: QCISD(T)/SDD

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(T)/SDD
 hartrees
Energy at 0K-79.421022
Energy at 298.15K-79.426920
HF Energy-79.203487
Nuclear repulsion energy41.412203
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(T)/SDD
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 2965 2828        
2 A1g 1444 1378        
3 A1g 980 935        
4 A1u 309 295        
5 A2u 2958 2821        
6 A2u 1437 1371        
7 Eg 3033 2893        
7 Eg 3033 2893        
8 Eg 1512 1442        
8 Eg 1511 1441        
9 Eg 1235 1178        
9 Eg 1235 1178        
10 Eu 3057 2915        
10 Eu 3057 2915        
11 Eu 1516 1446        
11 Eu 1516 1446        
12 Eu 829 791        
12 Eu 829 791        

Unscaled Zero Point Vibrational Energy (zpe) 16228.2 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 15476.8 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(T)/SDD
ABC
2.59412 0.63868 0.63868

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/SDD

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.783
C2 0.000 0.000 -0.783
H3 0.000 1.037 1.180
H4 -0.898 -0.518 1.180
H5 0.898 -0.518 1.180
H6 0.000 -1.037 -1.180
H7 -0.898 0.518 -1.180
H8 0.898 0.518 -1.180

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 H6 H7 H8
C11.56671.10991.10991.10992.22012.22012.2201
C21.56672.22012.22012.22011.10991.10991.1099
H31.10992.22011.79551.79553.14122.57742.5774
H41.10992.22011.79551.79552.57742.57743.1412
H51.10992.22011.79551.79552.57743.14122.5774
H62.22011.10993.14122.57742.57741.79551.7955
H72.22011.10992.57742.57743.14121.79551.7955
H82.22011.10992.57743.14122.57741.79551.7955

picture of Ethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 110.932 C1 C2 H7 110.932
C1 C2 H8 110.932 C2 C1 H3 110.932
C2 C1 H4 110.932 C2 C1 H5 110.932
H3 C1 H4 107.972 H3 C1 H5 107.972
H4 C1 H5 107.972 H6 C2 H7 107.972
H6 C2 H8 107.972 H7 C2 H8 107.972
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability