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: B3PW91/aug-cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at B3PW91/aug-cc-pVQZ
 hartrees
Energy at 0K-79.838874
Energy at 298.15K-79.844770
HF Energy-79.838874
Nuclear repulsion energy42.317408
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 B3PW91/aug-cc-pVQZ
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 3034 3034 0.00      
2 A1g 1415 1415 0.00      
3 A1g 1012 1012 0.00      
4 A1u 302 302 0.00      
5 A2u 3034 3034 57.80      
6 A2u 1399 1399 1.51      
7 Eg 3088 3088 0.00      
7 Eg 3088 3088 0.00      
8 Eg 1496 1496 0.00      
8 Eg 1496 1496 0.00      
9 Eg 1214 1214 0.00      
9 Eg 1214 1214 0.00      
10 Eu 3112 3112 57.80      
10 Eu 3112 3112 57.80      
11 Eu 1497 1497 9.79      
11 Eu 1497 1497 9.79      
12 Eu 821 821 4.35      
12 Eu 821 821 4.35      

Unscaled Zero Point Vibrational Energy (zpe) 16325.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16325.0 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 B3PW91/aug-cc-pVQZ
ABC
2.70098 0.67042 0.67042

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/aug-cc-pVQZ

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.761
C2 0.000 0.000 -0.761
H3 0.000 1.016 1.159
H4 -0.880 -0.508 1.159
H5 0.880 -0.508 1.159
H6 0.000 -1.016 -1.159
H7 -0.880 0.508 -1.159
H8 0.880 0.508 -1.159

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 H6 H7 H8
C11.52191.09131.09131.09132.17252.17252.1725
C21.52192.17252.17252.17251.09131.09131.0913
H31.09132.17251.75971.75973.08302.53152.5315
H41.09132.17251.75971.75972.53152.53153.0830
H51.09132.17251.75971.75972.53153.08302.5315
H62.17251.09133.08302.53152.53151.75971.7597
H72.17251.09132.53152.53153.08301.75971.7597
H82.17251.09132.53153.08302.53151.75971.7597

picture of Ethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 111.412 C1 C2 H7 111.412
C1 C2 H8 111.412 C2 C1 H3 111.412
C2 C1 H4 111.412 C2 C1 H5 111.412
H3 C1 H4 107.463 H3 C1 H5 107.463
H4 C1 H5 107.463 H6 C2 H7 107.463
H6 C2 H8 107.463 H7 C2 H8 107.463
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/aug-cc-pVQZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.736      
2 C -0.736      
3 H 0.245      
4 H 0.245      
5 H 0.245      
6 H 0.245      
7 H 0.245      
8 H 0.245      


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
Primitive
 xyz
x -14.810 0.000 0.000
y 0.000 -14.810 0.000
z 0.000 0.000 -15.512
Traceless
 xyz
x 0.351 0.000 0.000
y 0.000 0.351 0.000
z 0.000 0.000 -0.702
Polar
3z2-r2-1.404
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.065 0.000 0.000
y 0.000 4.065 0.000
z 0.000 0.000 4.666


<r2> (average value of r2) Å2
<r2> 30.602
(<r2>)1/2 5.532