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: MP3=FULL/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at MP3=FULL/6-31G**
 hartrees
Energy at 0K-79.583034
Energy at 298.15K-79.589002
HF Energy-79.238218
Nuclear repulsion energy42.381458
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 MP3=FULL/6-31G**
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 3143 3143 0.00      
2 A1g 1499 1499 0.00      
3 A1g 1049 1049 0.00      
4 A1u 333 333 0.00      
5 A2u 3142 3142 50.23      
6 A2u 1468 1468 0.24      
7 Eg 3215 3215 0.00      
7 Eg 3215 3215 0.00      
8 Eg 1569 1569 0.00      
8 Eg 1569 1569 0.00      
9 Eg 1275 1275 0.00      
9 Eg 1275 1275 0.00      
10 Eu 3236 3236 65.57      
10 Eu 3236 3236 65.57      
11 Eu 1575 1575 5.96      
11 Eu 1575 1575 5.96      
12 Eu 848 848 2.82      
12 Eu 848 848 2.82      

Unscaled Zero Point Vibrational Energy (zpe) 17034.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 17034.5 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 MP3=FULL/6-31G**
ABC
2.71014 0.67121 0.67121

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/6-31G**

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 1.014 1.155
H4 -0.878 -0.507 1.155
H5 0.878 -0.507 1.155
H6 0.000 -1.014 -1.155
H7 -0.878 0.507 -1.155
H8 0.878 0.507 -1.155

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 H6 H7 H8
C11.52441.08751.08751.08752.16872.16872.1687
C21.52442.16872.16872.16871.08751.08751.0875
H31.08752.16871.75671.75673.07372.52222.5222
H41.08752.16871.75671.75672.52222.52223.0737
H51.08752.16871.75671.75672.52223.07372.5222
H62.16871.08753.07372.52222.52221.75671.7567
H72.16871.08752.52222.52223.07371.75671.7567
H82.16871.08752.52223.07372.52221.75671.7567

picture of Ethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 111.154 C1 C2 H7 111.154
C1 C2 H8 111.154 C2 C1 H3 111.154
C2 C1 H4 111.154 C2 C1 H5 111.154
H3 C1 H4 107.737 H3 C1 H5 107.737
H4 C1 H5 107.737 H6 C2 H7 107.737
H6 C2 H8 107.737 H7 C2 H8 107.737
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability