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: MP2=FULL/LANL2DZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at MP2=FULL/LANL2DZ
 hartrees
Energy at 0K-79.384741
Energy at 298.15K-79.390669
HF Energy-79.204181
Nuclear repulsion energy41.584245
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 MP2=FULL/LANL2DZ
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 3028 2854 0.00      
2 A1g 1465 1381 0.00      
3 A1g 1000 943 0.00      
4 A1u 317 299 0.00      
5 A2u 3023 2850 72.18      
6 A2u 1459 1375 7.92      
7 Eg 3112 2934 0.00      
7 Eg 3112 2934 0.00      
8 Eg 1540 1452 0.00      
8 Eg 1540 1452 0.00      
9 Eg 1254 1183 0.00      
9 Eg 1254 1183 0.00      
10 Eu 3135 2955 99.16      
10 Eu 3135 2955 99.16      
11 Eu 1543 1454 12.33      
11 Eu 1543 1454 12.33      
12 Eu 844 796 7.38      
12 Eu 844 796 7.38      

Unscaled Zero Point Vibrational Energy (zpe) 16574.1 cm-1
Scaled (by 0.9427) Zero Point Vibrational Energy (zpe) 15624.4 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 MP2=FULL/LANL2DZ
ABC
2.62020 0.64346 0.64346

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/LANL2DZ

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.781
C2 0.000 0.000 -0.781
H3 0.000 1.031 1.176
H4 -0.893 -0.516 1.176
H5 0.893 -0.516 1.176
H6 0.000 -1.031 -1.176
H7 -0.893 0.516 -1.176
H8 0.893 0.516 -1.176

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 H6 H7 H8
C11.56101.10461.10461.10462.21162.21162.2116
C21.56102.21162.21162.21161.10461.10461.1046
H31.10462.21161.78661.78663.12832.56792.5679
H41.10462.21161.78661.78662.56792.56793.1283
H51.10462.21161.78661.78662.56793.12832.5679
H62.21161.10463.12832.56792.56791.78661.7866
H72.21161.10462.56792.56793.12831.78661.7866
H82.21161.10462.56793.12832.56791.78661.7866

picture of Ethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 110.969 C1 C2 H7 110.969
C1 C2 H8 110.969 C2 C1 H3 110.969
C2 C1 H4 110.969 C2 C1 H5 110.969
H3 C1 H4 107.933 H3 C1 H5 107.933
H4 C1 H5 107.933 H6 C2 H7 107.933
H6 C2 H8 107.933 H7 C2 H8 107.933
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability