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: TPSSh/daug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at TPSSh/daug-cc-pVTZ
 hartrees
Energy at 0K-79.866249
Energy at 298.15K-79.872138
HF Energy-79.866249
Nuclear repulsion energy42.222374
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 TPSSh/daug-cc-pVTZ
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 3023 3023 0.00 358.38 0.00 0.01
2 A1g 1425 1425 0.00 0.01 0.06 0.11
3 A1g 996 996 0.00 12.57 0.18 0.31
4 A1u 303 303 0.00 0.00 0.00 0.00
5 A2u 3023 3023 63.66 0.00 0.00 0.00
6 A2u 1413 1413 0.24 0.00 0.00 0.00
7 Eg 3070 3070 0.00 129.11 0.75 0.86
7 Eg 3070 3070 0.00 129.20 0.75 0.86
8 Eg 1512 1512 0.00 8.93 0.75 0.86
8 Eg 1512 1512 0.00 9.00 0.75 0.86
9 Eg 1225 1225 0.00 0.09 0.75 0.86
9 Eg 1225 1225 0.00 0.09 0.75 0.86
10 Eu 3096 3096 70.61 0.00 0.00 0.00
10 Eu 3096 3096 70.61 0.00 0.00 0.00
11 Eu 1515 1515 7.44 0.00 0.00 0.00
11 Eu 1515 1515 7.44 0.00 0.00 0.00
12 Eu 816 816 3.11 0.00 0.00 0.00
12 Eu 816 816 3.11 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 16324.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16324.5 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 TPSSh/daug-cc-pVTZ
ABC
2.68879 0.66678 0.66678

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/daug-cc-pVTZ

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 1.018 1.160
H4 -0.882 -0.509 1.160
H5 0.882 -0.509 1.160
H6 0.000 -1.018 -1.160
H7 -0.882 0.509 -1.160
H8 0.882 0.509 -1.160

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 H6 H7 H8
C11.52801.09261.09261.09262.17692.17692.1769
C21.52802.17692.17692.17691.09261.09261.0926
H31.09262.17691.76371.76373.08712.53382.5338
H41.09262.17691.76371.76372.53382.53383.0871
H51.09262.17691.76371.76372.53383.08712.5338
H62.17691.09263.08712.53382.53381.76371.7637
H72.17691.09262.53382.53383.08711.76371.7637
H82.17691.09262.53383.08712.53381.76371.7637

picture of Ethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 111.254 C1 C2 H7 111.254
C1 C2 H8 111.254 C2 C1 H3 111.254
C2 C1 H4 111.254 C2 C1 H5 111.254
H3 C1 H4 107.631 H3 C1 H5 107.631
H4 C1 H5 107.631 H6 C2 H7 107.631
H6 C2 H8 107.631 H7 C2 H8 107.631
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.333      
2 C -0.333      
3 H 0.111      
4 H 0.111      
5 H 0.111      
6 H 0.111      
7 H 0.111      
8 H 0.111      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.102 0.000 0.000
y 0.000 4.102 0.000
z 0.000 0.000 4.730


<r2> (average value of r2) Å2
<r2> 30.746
(<r2>)1/2 5.545