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

using model chemistry: QCISD(T)/aug-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)/aug-cc-pVDZ
 hartrees
Energy at 0K-153.418925
Energy at 298.15K 
HF Energy-152.886150
Nuclear repulsion energy74.207620
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-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 3110 3041        
2 A1 1522 1488        
3 A1 1277 1249        
4 A1 1131 1106        
5 A1 869 850        
6 A2 3196 3125        
7 A2 1155 1129        
8 A2 1023 1001        
9 B1 3211 3140        
10 B1 1141 1115        
11 B1 801 783        
12 B2 3102 3033        
13 B2 1484 1451        
14 B2 1138 1113        
15 B2 801 783        

Unscaled Zero Point Vibrational Energy (zpe) 12479.5 cm-1
Scaled (by 0.9778) Zero Point Vibrational Energy (zpe) 12202.4 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-pVDZ
ABC
0.82677 0.72377 0.45965

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.870
C2 0.000 0.741 -0.382
C3 0.000 -0.741 -0.382
H4 0.932 1.280 -0.594
H5 -0.932 1.280 -0.594
H6 -0.932 -1.280 -0.594
H7 0.932 -1.280 -0.594

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.45421.45422.15632.15632.15632.1563
C21.45421.48251.09731.09732.23572.2357
C31.45421.48252.23572.23571.09731.0973
H42.15631.09732.23571.86443.16632.5593
H52.15631.09732.23571.86442.55933.1663
H62.15632.23571.09733.16632.55931.8644
H72.15632.23571.09732.55933.16631.8644

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 59.354 O1 C2 H4 114.640
O1 C2 H5 114.640 O1 C3 C2 59.354
O1 C3 H6 114.640 O1 C3 H7 114.640
C2 O1 C3 61.291 C2 C3 H6 119.382
C2 C3 H7 119.382 C3 C2 H4 119.382
C3 C2 H5 119.382 H4 C2 H5 116.319
H6 C3 H7 116.319
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability