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

using model chemistry: QCISD(T)/daug-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)/daug-cc-pVTZ
 hartrees
Energy at 0K-153.558662
Energy at 298.15K 
HF Energy-152.928034
Nuclear repulsion energy75.047950
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-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 3113 3113        
2 A1 1538 1538        
3 A1 1292 1292        
4 A1 1149 1149        
5 A1 889 889        
6 A2 3194 3194        
7 A2 1170 1170        
8 A2 1045 1045        
9 B1 3208 3208        
10 B1 1163 1163        
11 B1 811 811        
12 B2 3105 3105        
13 B2 1503 1503        
14 B2 1159 1159        
15 B2 838 838        

Unscaled Zero Point Vibrational Energy (zpe) 12588.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12588.8 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-pVTZ
ABC
0.84756 0.73859 0.46997

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/daug-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
O11.43671.43672.13292.13292.13292.1329
C21.43671.46861.08501.08502.21272.2127
C31.43671.46862.21272.21271.08501.0850
H42.13291.08502.21271.84273.13172.5322
H52.13291.08502.21271.84272.53223.1317
H62.13292.21271.08503.13172.53221.8427
H72.13292.21271.08502.53223.13171.8427

picture of Ethylene oxide state 1 conformation 1
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