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All results from a given calculation for C2H4O (Ethylene oxide)

using model chemistry: QCISD(T)=FULL/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at QCISD(T)=FULL/cc-pVTZ
 hartrees
Energy at 0K-153.590088
Energy at 298.15K 
HF Energy-152.926044
Nuclear repulsion energy75.434280
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)=FULL/cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3138 3002        
2 A1 1560 1493        
3 A1 1311 1255        
4 A1 1166 1116        
5 A1 907 868        
6 A2 3197 3060        
7 A2 1181 1130        
8 A2 1060 1015        
9 B1 3213 3075        
10 B1 1186 1135        
11 B1 820 785        
12 B2 3128 2993        
13 B2 1524 1458        
14 B2 1167 1116        
15 B2 854 817        

Unscaled Zero Point Vibrational Energy (zpe) 12705.8 cm-1
Scaled (by 0.9569) Zero Point Vibrational Energy (zpe) 12158.2 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)=FULL/cc-pVTZ
ABC
0.85769 0.74509 0.47476

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.854
C2 0.000 0.732 -0.372
C3 0.000 -0.732 -0.372
H4 0.916 1.260 -0.592
H5 -0.916 1.260 -0.592
H6 -0.916 -1.260 -0.592
H7 0.916 -1.260 -0.592

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.42751.42752.12522.12522.12522.1252
C21.42751.46311.08031.08032.20292.2029
C31.42751.46312.20292.20291.08031.0803
H42.12521.08032.20291.83293.11542.5191
H52.12521.08032.20291.83292.51913.1154
H62.12522.20291.08033.11542.51911.8329
H72.12522.20291.08032.51913.11541.8329

picture of Ethylene oxide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 59.171 O1 C2 H4 115.172
O1 C2 H5 115.172 O1 C3 C2 59.171
O1 C3 H6 115.172 O1 C3 H7 115.172
C2 O1 C3 61.657 C2 C3 H6 119.259
C2 C3 H7 119.259 C3 C2 H4 119.259
C3 C2 H5 119.259 H4 C2 H5 116.058
H6 C3 H7 116.058
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability