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

using model chemistry: CISD/6-311+G(3df,2p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CISD/6-311+G(3df,2p)
 hartrees
Energy at 0K-153.450340
Energy at 298.15K 
HF Energy-152.925898
Nuclear repulsion energy76.109468
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 CISD/6-311+G(3df,2p)
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 3212 2961 13.54      
2 A1 1614 1488 3.31      
3 A1 1370 1263 16.53      
4 A1 1226 1130 0.78      
5 A1 955 881 77.29      
6 A2 3292 3034 0.00      
7 A2 1223 1128 0.00      
8 A2 1105 1019 0.00      
9 B1 3307 3048 32.96      
10 B1 1233 1136 6.05      
11 B1 849 782 0.32      
12 B2 3201 2951 30.62      
13 B2 1567 1445 0.13      
14 B2 1230 1134 0.06      
15 B2 932 859 9.59      

Unscaled Zero Point Vibrational Energy (zpe) 13158.0 cm-1
Scaled (by 0.9218) Zero Point Vibrational Energy (zpe) 12129.0 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 CISD/6-311+G(3df,2p)
ABC
0.88203 0.75156 0.48399

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/6-311+G(3df,2p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.840
C2 0.000 0.727 -0.367
C3 0.000 -0.727 -0.367
H4 0.912 1.259 -0.581
H5 -0.912 1.259 -0.581
H6 -0.912 -1.259 -0.581
H7 0.912 -1.259 -0.581

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.40891.40892.10612.10612.10612.1061
C21.40891.45411.07751.07752.19582.1958
C31.40891.45412.19582.19581.07751.0775
H42.10611.07752.19581.82493.10932.5174
H52.10611.07752.19581.82492.51743.1093
H62.10612.19581.07753.10932.51741.8249
H72.10612.19581.07752.51743.10931.8249

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 58.932 O1 C2 H4 115.135
O1 C2 H5 115.135 O1 C3 C2 58.932
O1 C3 H6 115.135 O1 C3 H7 115.135
C2 O1 C3 62.135 C2 C3 H6 119.565
C2 C3 H7 119.565 C3 C2 H4 119.565
C3 C2 H5 119.565 H4 C2 H5 115.734
H6 C3 H7 115.734
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability