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

using model chemistry: QCISD(T)=FULL/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-153.398893
Energy at 298.15K 
HF Energy-152.876411
Nuclear repulsion energy74.859297
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/6-31+G**
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 3169 3169        
2 A1 1580 1580        
3 A1 1308 1308        
4 A1 1181 1181        
5 A1 895 895        
6 A2 3252 3252        
7 A2 1199 1199        
8 A2 1060 1060        
9 B1 3266 3266        
10 B1 1176 1176        
11 B1 832 832        
12 B2 3161 3161        
13 B2 1545 1545        
14 B2 1175 1175        
15 B2 842 842        

Unscaled Zero Point Vibrational Energy (zpe) 12819.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12819.1 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/6-31+G**
ABC
0.84137 0.73671 0.46678

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/6-31+G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.863
C2 0.000 0.735 -0.378
C3 0.000 -0.735 -0.378
H4 0.919 1.270 -0.592
H5 -0.919 1.270 -0.592
H6 -0.919 -1.270 -0.592
H7 0.919 -1.270 -0.592

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.44261.44262.13892.13892.13892.1389
C21.44261.47061.08441.08442.21632.2163
C31.44261.47062.21632.21631.08441.0844
H42.13891.08442.21631.83723.13522.5405
H52.13891.08442.21631.83722.54053.1352
H62.13892.21631.08443.13522.54051.8372
H72.13892.21631.08442.54053.13521.8372

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 59.356 O1 C2 H4 114.917
O1 C2 H5 114.917 O1 C3 C2 59.356
O1 C3 H6 114.917 O1 C3 H7 114.917
C2 O1 C3 61.288 C2 C3 H6 119.558
C2 C3 H7 119.558 C3 C2 H4 119.558
C3 C2 H5 119.558 H4 C2 H5 115.806
H6 C3 H7 115.806
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability