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

using model chemistry: QCISD/aug-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/aug-cc-pVTZ
 hartrees
Energy at 0K-153.532640
Energy at 298.15K 
HF Energy-152.928651
Nuclear repulsion energy75.355924
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/aug-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 3136 3019 14.51      
2 A1 1562 1504 2.47      
3 A1 1317 1267 13.04      
4 A1 1173 1129 0.09      
5 A1 912 877 70.88      
6 A2 3214 3093 0.00      
7 A2 1185 1140 0.00      
8 A2 1062 1022 0.00      
9 B1 3229 3107 32.66      
10 B1 1183 1138 4.65      
11 B1 824 793 0.24      
12 B2 3128 3010 30.06      
13 B2 1522 1465 0.06      
14 B2 1181 1137 0.14      
15 B2 868 835 8.78      

Unscaled Zero Point Vibrational Energy (zpe) 12747.1 cm-1
Scaled (by 0.9624) Zero Point Vibrational Energy (zpe) 12267.9 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/aug-cc-pVTZ
ABC
0.85724 0.74259 0.47410

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.853
C2 0.000 0.732 -0.373
C3 0.000 -0.732 -0.373
H4 0.919 1.264 -0.587
H5 -0.919 1.264 -0.587
H6 -0.919 -1.264 -0.587
H7 0.919 -1.264 -0.587

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.42851.42852.12522.12522.12522.1252
C21.42851.46381.08321.08322.20762.2076
C31.42851.46382.20762.20761.08321.0832
H42.12521.08322.20761.83803.12552.5280
H52.12521.08322.20761.83802.52803.1255
H62.12522.20761.08323.12552.52801.8380
H72.12522.20761.08322.52803.12551.8380

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 59.180 O1 C2 H4 114.895
O1 C2 H5 114.895 O1 C3 C2 59.180
O1 C3 H6 114.895 O1 C3 H7 114.895
C2 O1 C3 61.641 C2 C3 H6 119.423
C2 C3 H7 119.423 C3 C2 H4 119.423
C3 C2 H5 119.423 H4 C2 H5 116.082
H6 C3 H7 116.082
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability