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All results from a given calculation for C2H6 (Ethane)

using model chemistry: QCISD(T)/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at QCISD(T)/3-21G*
 hartrees
Energy at 0K-79.017307
Energy at 298.15K-79.023235
HF Energy-78.792731
Nuclear repulsion energy41.710509
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 QCISD(T)/3-21G*
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 3015 2875        
2 A1g 1471 1402        
3 A1g 947 903        
4 A1u 311 296        
5 A2u 3014 2875        
6 A2u 1476 1407        
7 Eg 3065 2923        
7 Eg 3065 2923        
8 Eg 1577 1504        
8 Eg 1576 1503        
9 Eg 1270 1211        
9 Eg 1269 1211        
10 Eu 3088 2945        
10 Eu 3088 2945        
11 Eu 1579 1506        
11 Eu 1579 1506        
12 Eu 857 817        
12 Eu 857 817        

Unscaled Zero Point Vibrational Energy (zpe) 16551.7 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 15785.3 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 QCISD(T)/3-21G*
ABC
2.63033 0.64709 0.64709

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/3-21G*

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.780
C2 0.000 0.000 -0.780
H3 0.000 1.029 1.168
H4 -0.892 -0.515 1.168
H5 0.892 -0.515 1.168
H6 0.000 -1.029 -1.168
H7 -0.892 0.515 -1.168
H8 0.892 0.515 -1.168

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 H6 H7 H8
C11.55961.10031.10031.10032.20332.20332.2033
C21.55962.20332.20332.20331.10031.10031.1003
H31.10032.20331.78311.78313.11422.55322.5532
H41.10032.20331.78311.78312.55322.55323.1142
H51.10032.20331.78311.78312.55323.11422.5532
H62.20331.10033.11422.55322.55321.78311.7831
H72.20331.10032.55322.55323.11421.78311.7831
H82.20331.10032.55323.11422.55321.78311.7831

picture of Ethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 110.669 C1 C2 H7 110.669
C1 C2 H8 110.669 C2 C1 H3 110.669
C2 C1 H4 110.669 C2 C1 H5 110.669
H3 C1 H4 108.247 H3 C1 H5 108.247
H4 C1 H5 108.247 H6 C2 H7 108.247
H6 C2 H8 108.247 H7 C2 H8 108.247
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability