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: MP4/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at MP4/6-311G*
 hartrees
Energy at 0K-79.566321
Energy at 298.15K-79.572243
HF Energy-79.242239
Nuclear repulsion energy42.063783
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 MP4/6-311G*
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 3031 2907        
2 A1g 1452 1393        
3 A1g 1021 979        
4 A1u 317 304        
5 A2u 3029 2905        
6 A2u 1431 1372        
7 Eg 3095 2968        
7 Eg 3095 2968        
8 Eg 1527 1465        
8 Eg 1526 1464        
9 Eg 1238 1187        
9 Eg 1238 1187        
10 Eu 3117 2989        
10 Eu 3117 2989        
11 Eu 1531 1468        
11 Eu 1530 1467        
12 Eu 826 792        
12 Eu 826 792        

Unscaled Zero Point Vibrational Energy (zpe) 16473.3 cm-1
Scaled (by 0.959) Zero Point Vibrational Energy (zpe) 15797.9 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 MP4/6-311G*
ABC
2.66635 0.66206 0.66206

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-311G*

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.767
C2 0.000 0.000 -0.767
H3 0.000 1.023 1.164
H4 -0.886 -0.511 1.164
H5 0.886 -0.511 1.164
H6 0.000 -1.023 -1.164
H7 -0.886 0.511 -1.164
H8 0.886 0.511 -1.164

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 H6 H7 H8
C11.53321.09711.09711.09712.18492.18492.1849
C21.53322.18492.18492.18491.09711.09711.0971
H31.09712.18491.77111.77113.09902.54312.5431
H41.09712.18491.77111.77112.54312.54313.0990
H51.09712.18491.77111.77112.54313.09902.5431
H62.18491.09713.09902.54312.54311.77111.7711
H72.18491.09712.54312.54313.09901.77111.7711
H82.18491.09712.54313.09902.54311.77111.7711

picture of Ethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 111.250 C1 C2 H7 111.250
C1 C2 H8 111.250 C2 C1 H3 111.250
C2 C1 H4 111.250 C2 C1 H5 111.250
H3 C1 H4 107.636 H3 C1 H5 107.636
H4 C1 H5 107.636 H6 C2 H7 107.636
H6 C2 H8 107.636 H7 C2 H8 107.636
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability