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: CCSD(T)/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 CCSD(T)/6-31+G**
 hartrees
Energy at 0K-79.588103
Energy at 298.15K-79.594043
HF Energy-79.238580
Nuclear repulsion energy42.196501
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 CCSD(T)/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 3085 2961        
2 A1g 1471 1411        
3 A1g 1027 985        
4 A1u 324 311        
5 A2u 3082 2957        
6 A2u 1443 1385        
7 Eg 3151 3024        
7 Eg 3151 3024        
8 Eg 1536 1474        
8 Eg 1535 1473        
9 Eg 1252 1201        
9 Eg 1252 1201        
10 Eu 3173 3044        
10 Eu 3173 3044        
11 Eu 1540 1478        
11 Eu 1540 1477        
12 Eu 833 800        
12 Eu 833 799        

Unscaled Zero Point Vibrational Energy (zpe) 16699.2 cm-1
Scaled (by 0.9596) Zero Point Vibrational Energy (zpe) 16024.6 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 CCSD(T)/6-31+G**
ABC
2.68407 0.66580 0.66580

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/6-31+G**

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.765
C2 0.000 0.000 -0.765
H3 0.000 1.019 1.159
H4 -0.883 -0.510 1.159
H5 0.883 -0.510 1.159
H6 0.000 -1.019 -1.159
H7 -0.883 0.510 -1.159
H8 0.883 0.510 -1.159

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 H6 H7 H8
C11.53061.09251.09251.09252.17752.17752.1775
C21.53062.17752.17752.17751.09251.09251.0925
H31.09252.17751.76521.76523.08672.53222.5322
H41.09252.17751.76521.76522.53222.53223.0867
H51.09252.17751.76521.76522.53223.08672.5322
H62.17751.09253.08672.53222.53221.76521.7652
H72.17751.09252.53222.53223.08671.76521.7652
H82.17751.09252.53223.08672.53221.76521.7652

picture of Ethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 111.123 C1 C2 H7 111.123
C1 C2 H8 111.123 C2 C1 H3 111.123
C2 C1 H4 111.123 C2 C1 H5 111.123
H3 C1 H4 107.770 H3 C1 H5 107.770
H4 C1 H5 107.770 H6 C2 H7 107.770
H6 C2 H8 107.770 H7 C2 H8 107.770
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability