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All results from a given calculation for C2H6 (Ethane)

using model chemistry: QCISD(T)/6-31G(2df,p)

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)/6-31G(2df,p)
 hartrees
Energy at 0K-79.629167
Energy at 298.15K-79.635082
HF Energy-79.241478
Nuclear repulsion energy42.149813
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)/6-31G(2df,p)
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 3075 3075        
2 A1g 1445 1445        
3 A1g 1018 1018        
4 A1u 311 311        
5 A2u 3074 3074        
6 A2u 1424 1424        
7 Eg 3140 3140        
7 Eg 3140 3140        
8 Eg 1527 1527        
8 Eg 1527 1527        
9 Eg 1233 1233        
9 Eg 1233 1233        
10 Eu 3162 3162        
10 Eu 3162 3162        
11 Eu 1531 1531        
11 Eu 1530 1530        
12 Eu 825 825        
12 Eu 825 825        

Unscaled Zero Point Vibrational Energy (zpe) 16590.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16590.0 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)/6-31G(2df,p)
ABC
2.68081 0.66388 0.66388

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/6-31G(2df,p)

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.766
C2 0.000 0.000 -0.766
H3 0.000 1.020 1.162
H4 -0.883 -0.510 1.162
H5 0.883 -0.510 1.162
H6 0.000 -1.020 -1.162
H7 -0.883 0.510 -1.162
H8 0.883 0.510 -1.162

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 H6 H7 H8
C11.53241.09371.09371.09372.18092.18092.1809
C21.53242.18092.18092.18091.09371.09371.0937
H31.09372.18091.76631.76633.09132.53702.5370
H41.09372.18091.76631.76632.53702.53703.0913
H51.09372.18091.76631.76632.53703.09132.5370
H62.18091.09373.09132.53702.53701.76631.7663
H72.18091.09372.53702.53703.09131.76631.7663
H82.18091.09372.53703.09132.53701.76631.7663

picture of Ethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 111.189 C1 C2 H7 111.189
C1 C2 H8 111.189 C2 C1 H3 111.189
C2 C1 H4 111.189 C2 C1 H5 111.189
H3 C1 H4 107.700 H3 C1 H5 107.700
H4 C1 H5 107.700 H6 C2 H7 107.700
H6 C2 H8 107.700 H7 C2 H8 107.700
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability