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: CCSD(T)=FULL/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at CCSD(T)=FULL/STO-3G
 hartrees
Energy at 0K-78.455058
Energy at 298.15K-78.460892
HF Energy-78.302533
Nuclear repulsion energy41.430581
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 CCSD(T)=FULL/STO-3G
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 3276 3276        
2 A1g 1604 1604        
3 A1g 1097 1097        
4 A1u 291 291        
5 A2u 3277 3277        
6 A2u 1572 1572        
7 Eg 3432 3432        
7 Eg 3432 3432        
8 Eg 1684 1684        
8 Eg 1684 1684        
9 Eg 1338 1338        
9 Eg 1338 1338        
10 Eu 3444 3444        
10 Eu 3444 3444        
11 Eu 1700 1700        
11 Eu 1700 1700        
12 Eu 899 899        
12 Eu 899 899        

Unscaled Zero Point Vibrational Energy (zpe) 18054.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 18054.6 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 CCSD(T)=FULL/STO-3G
ABC
2.57843 0.64169 0.64169

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/STO-3G

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 1.040 1.175
H4 -0.900 -0.520 1.175
H5 0.900 -0.520 1.175
H6 0.000 -1.040 -1.175
H7 -0.900 0.520 -1.175
H8 0.900 0.520 -1.175

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 H6 H7 H8
C11.56281.11181.11181.11182.21552.21552.2155
C21.56282.21552.21552.21551.11181.11181.1118
H31.11182.21551.80101.80103.13792.56962.5696
H41.11182.21551.80101.80102.56962.56963.1379
H51.11182.21551.80101.80102.56963.13792.5696
H62.21551.11183.13792.56962.56961.80101.8010
H72.21551.11182.56962.56963.13791.80101.8010
H82.21551.11182.56963.13792.56961.80101.8010

picture of Ethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 110.727 C1 C2 H7 110.727
C1 C2 H8 110.727 C2 C1 H3 110.727
C2 C1 H4 110.727 C2 C1 H5 110.727
H3 C1 H4 108.187 H3 C1 H5 108.187
H4 C1 H5 108.187 H6 C2 H7 108.187
H6 C2 H8 108.187 H7 C2 H8 108.187
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability