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

using model chemistry: QCISD/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 QCISD/6-311+G(3df,2p)
 hartrees
Energy at 0K-153.517965
Energy at 298.15K 
HF Energy-152.924912
Nuclear repulsion energy75.486326
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/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 3134 2989 14.53      
2 A1 1566 1493 2.66      
3 A1 1323 1262 13.57      
4 A1 1179 1124 0.17      
5 A1 917 875 70.36      
6 A2 3213 3064 0.00      
7 A2 1189 1134 0.00      
8 A2 1070 1020 0.00      
9 B1 3227 3078 34.52      
10 B1 1192 1137 4.65      
11 B1 826 788 0.23      
12 B2 3124 2979 30.88      
13 B2 1525 1454 0.05      
14 B2 1186 1132 0.15      
15 B2 878 838 8.65      

Unscaled Zero Point Vibrational Energy (zpe) 12775.2 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 12183.7 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/6-311+G(3df,2p)
ABC
0.86316 0.74287 0.47595

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.850
C2 0.000 0.731 -0.371
C3 0.000 -0.731 -0.371
H4 0.919 1.265 -0.586
H5 -0.919 1.265 -0.586
H6 -0.919 -1.265 -0.586
H7 0.919 -1.265 -0.586

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.42371.42372.12272.12272.12272.1227
C21.42371.46271.08391.08392.20822.2082
C31.42371.46272.20822.20821.08391.0839
H42.12271.08392.20821.83733.12712.5305
H52.12271.08392.20821.83732.53053.1271
H62.12272.20821.08393.12712.53051.8373
H72.12272.20821.08392.53053.12711.8373

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 59.089 O1 C2 H4 114.998
O1 C2 H5 114.998 O1 C3 C2 59.089
O1 C3 H6 114.998 O1 C3 H7 114.998
C2 O1 C3 61.823 C2 C3 H6 119.509
C2 C3 H7 119.509 C3 C2 H4 119.509
C3 C2 H5 119.509 H4 C2 H5 115.890
H6 C3 H7 115.890
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability