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: MP4=FULL/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at MP4=FULL/6-31+G**
 hartrees
Energy at 0K-79.597159
Energy at 298.15K-79.603105
HF Energy-79.238659
Nuclear repulsion energy42.262803
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 MP4=FULL/6-31+G**
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 3096 3096        
2 A1g 1475 1475        
3 A1g 1030 1030        
4 A1u 326 326        
5 A2u 3093 3093        
6 A2u 1447 1447        
7 Eg 3167 3167        
7 Eg 3167 3167        
8 Eg 1541 1541        
8 Eg 1541 1541        
9 Eg 1255 1255        
9 Eg 1255 1255        
10 Eu 3188 3188        
10 Eu 3188 3188        
11 Eu 1545 1545        
11 Eu 1545 1545        
12 Eu 836 836        
12 Eu 836 836        

Unscaled Zero Point Vibrational Energy (zpe) 16764.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16764.7 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 MP4=FULL/6-31+G**
ABC
2.69313 0.66766 0.66766

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/6-31+G**

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.764
C2 0.000 0.000 -0.764
H3 0.000 1.017 1.158
H4 -0.881 -0.509 1.158
H5 0.881 -0.509 1.158
H6 0.000 -1.017 -1.158
H7 -0.881 0.509 -1.158
H8 0.881 0.509 -1.158

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 H6 H7 H8
C11.52831.09091.09091.09092.17462.17462.1746
C21.52832.17462.17462.17461.09091.09091.0909
H31.09092.17461.76221.76223.08262.52922.5292
H41.09092.17461.76221.76222.52922.52923.0826
H51.09092.17461.76221.76222.52923.08262.5292
H62.17461.09093.08262.52922.52921.76221.7622
H72.17461.09092.52922.52923.08261.76221.7622
H82.17461.09092.52923.08262.52921.76221.7622

picture of Ethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 111.153 C1 C2 H7 111.153
C1 C2 H8 111.153 C2 C1 H3 111.153
C2 C1 H4 111.153 C2 C1 H5 111.153
H3 C1 H4 107.739 H3 C1 H5 107.739
H4 C1 H5 107.739 H6 C2 H7 107.739
H6 C2 H8 107.739 H7 C2 H8 107.739
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability