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

using model chemistry: QCISD(T)/daug-cc-pVDZ

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)/daug-cc-pVDZ
 hartrees
Energy at 0K-153.421168
Energy at 298.15K 
HF Energy-152.886822
Nuclear repulsion energy74.218958
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)/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 A1 3107 3107        
2 A1 1520 1520        
3 A1 1275 1275        
4 A1 1123 1123        
5 A1 868 868        
6 A2 3194 3194        
7 A2 1154 1154        
8 A2 1026 1026        
9 B1 3209 3209        
10 B1 1140 1140        
11 B1 798 798        
12 B2 3099 3099        
13 B2 1483 1483        
14 B2 1134 1134        
15 B2 799 799        

Unscaled Zero Point Vibrational Energy (zpe) 12463.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12463.3 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)/daug-cc-pVDZ
ABC
0.82713 0.72387 0.45971

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.869
C2 0.000 0.741 -0.381
C3 0.000 -0.741 -0.381
H4 0.932 1.279 -0.595
H5 -0.932 1.279 -0.595
H6 -0.932 -1.279 -0.595
H7 0.932 -1.279 -0.595

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.45401.45402.15602.15602.15602.1560
C21.45401.48281.09671.09672.23522.2352
C31.45401.48282.23522.23521.09671.0967
H42.15601.09672.23521.86343.16502.5583
H52.15601.09672.23521.86342.55833.1650
H62.15602.23521.09673.16502.55831.8634
H72.15602.23521.09672.55833.16501.8634

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 59.343 O1 C2 H4 114.673
O1 C2 H5 114.673 O1 C3 C2 59.343
O1 C3 H6 114.673 O1 C3 H7 114.673
C2 O1 C3 61.315 C2 C3 H6 119.361
C2 C3 H7 119.361 C3 C2 H4 119.361
C3 C2 H5 119.361 H4 C2 H5 116.323
H6 C3 H7 116.323
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability