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

using model chemistry: QCISD(T)/aug-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)/aug-cc-pVTZ
 hartrees
Energy at 0K-153.557307
Energy at 298.15K 
HF Energy-152.927854
Nuclear repulsion energy75.054622
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)/aug-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 3115 3011        
2 A1 1540 1489        
3 A1 1293 1250        
4 A1 1149 1111        
5 A1 891 862        
6 A2 3194 3088        
7 A2 1170 1131        
8 A2 1045 1011        
9 B1 3209 3103        
10 B1 1164 1126        
11 B1 812 785        
12 B2 3107 3003        
13 B2 1504 1454        
14 B2 1159 1121        
15 B2 837 809        

Unscaled Zero Point Vibrational Energy (zpe) 12595.0 cm-1
Scaled (by 0.9668) Zero Point Vibrational Energy (zpe) 12176.9 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)/aug-cc-pVTZ
ABC
0.84777 0.73867 0.47004

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.859
C2 0.000 0.734 -0.376
C3 0.000 -0.734 -0.376
H4 0.921 1.266 -0.590
H5 -0.921 1.266 -0.590
H6 -0.921 -1.266 -0.590
H7 0.921 -1.266 -0.590

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.43651.43652.13282.13282.13282.1328
C21.43651.46851.08491.08492.21262.2126
C31.43651.46852.21262.21261.08491.0849
H42.13281.08492.21261.84243.13142.5321
H52.13281.08492.21261.84242.53213.1314
H62.13282.21261.08493.13142.53211.8424
H72.13282.21261.08492.53213.13141.8424

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 59.260 O1 C2 H4 114.822
O1 C2 H5 114.822 O1 C3 C2 59.260
O1 C3 H6 114.822 O1 C3 H7 114.822
C2 O1 C3 61.481 C2 C3 H6 119.351
C2 C3 H7 119.351 C3 C2 H4 119.351
C3 C2 H5 119.351 H4 C2 H5 116.227
H6 C3 H7 116.227
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability