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: B2PLYP/daug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at B2PLYP/daug-cc-pVDZ
 hartrees
Energy at 0K-79.730023
Energy at 298.15K-79.735933
HF Energy-79.626657
Nuclear repulsion energy42.066465
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 B2PLYP/daug-cc-pVDZ
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 3052 3052 0.00 356.60 0.00 0.01
2 A1g 1413 1413 0.00 0.05 0.10 0.18
3 A1g 1017 1017 0.00 13.88 0.18 0.30
4 A1u 312 312 0.00 0.00 0.00 0.00
5 A2u 3051 3051 61.29 0.00 0.00 0.00
6 A2u 1387 1387 0.69 0.00 0.00 0.00
7 Eg 3113 3113 0.00 123.94 0.75 0.86
7 Eg 3113 3113 0.00 124.07 0.75 0.86
8 Eg 1490 1490 0.00 8.92 0.75 0.86
8 Eg 1490 1490 0.00 8.92 0.75 0.86
9 Eg 1214 1214 0.00 0.07 0.75 0.86
9 Eg 1214 1214 0.00 0.07 0.75 0.86
10 Eu 3136 3136 67.24 0.00 0.00 0.00
10 Eu 3136 3136 67.24 0.00 0.00 0.00
11 Eu 1491 1491 8.20 0.00 0.00 0.00
11 Eu 1491 1491 8.20 0.00 0.00 0.00
12 Eu 818 818 3.07 0.00 0.00 0.00
12 Eu 818 818 3.07 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 16377.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16377.8 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 B2PLYP/daug-cc-pVDZ
ABC
2.66036 0.66337 0.66337

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/daug-cc-pVDZ

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 1.024 1.163
H4 -0.887 -0.512 1.163
H5 0.887 -0.512 1.163
H6 0.000 -1.024 -1.163
H7 -0.887 0.512 -1.163
H8 0.887 0.512 -1.163

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 H6 H7 H8
C11.53081.09831.09831.09832.18362.18362.1836
C21.53082.18362.18362.18361.09831.09831.0983
H31.09832.18361.77301.77303.09922.54202.5420
H41.09832.18361.77301.77312.54202.54203.0992
H51.09832.18361.77301.77312.54203.09922.5420
H62.18361.09833.09922.54202.54201.77301.7730
H72.18361.09832.54202.54203.09921.77301.7731
H82.18361.09832.54203.09922.54201.77301.7731

picture of Ethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 111.244 C1 C2 H7 111.244
C1 C2 H8 111.244 C2 C1 H3 111.244
C2 C1 H4 111.244 C2 C1 H5 111.244
H3 C1 H4 107.641 H3 C1 H5 107.641
H4 C1 H5 107.641 H6 C2 H7 107.641
H6 C2 H8 107.641 H7 C2 H8 107.641
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/daug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 1.018      
2 C 1.018      
3 H -0.339      
4 H -0.339      
5 H -0.339      
6 H -0.339      
7 H -0.339      
8 H -0.339      


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 -15.149 0.000 0.000
y 0.000 -15.149 0.000
z 0.000 0.000 -15.911
Traceless
 xyz
x 0.381 0.000 0.000
y 0.000 0.381 0.000
z 0.000 0.000 -0.763
Polar
3z2-r2-1.526
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 4.128 0.000 0.000
y 0.000 4.128 0.000
z 0.000 0.000 4.714


<r2> (average value of r2) Å2
<r2> 31.058
(<r2>)1/2 5.573