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

using model chemistry: CCD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CCD/3-21G*
 hartrees
Energy at 0K-152.324318
Energy at 298.15K 
HF Energy-151.997908
Nuclear repulsion energy72.720559
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 CCD/3-21G*
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 3143 3007 2.00      
2 A1 1587 1518 0.00      
3 A1 1216 1163 6.62      
4 A1 1145 1095 4.63      
5 A1 821 785 19.74      
6 A2 3217 3077 0.00      
7 A2 1209 1157 0.00      
8 A2 1007 964 0.00      
9 B1 3235 3094 36.65      
10 B1 1124 1075 1.68      
11 B1 854 817 0.02      
12 B2 3132 2995 17.00      
13 B2 1570 1501 0.03      
14 B2 1146 1096 12.09      
15 B2 788 754 1.07      

Unscaled Zero Point Vibrational Energy (zpe) 12596.0 cm-1
Scaled (by 0.9565) Zero Point Vibrational Energy (zpe) 12048.0 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 CCD/3-21G*
ABC
0.76674 0.71737 0.43641

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.912
C2 0.000 0.750 -0.398
C3 0.000 -0.750 -0.398
H4 0.922 1.278 -0.629
H5 -0.922 1.278 -0.629
H6 -0.922 -1.278 -0.629
H7 0.922 -1.278 -0.629

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.50941.50942.20362.20362.20362.2036
C21.50941.49931.08741.08742.23932.2393
C31.50941.49932.23932.23931.08741.0874
H42.20361.08742.23931.84453.15172.5557
H52.20361.08742.23931.84452.55573.1517
H62.20362.23931.08743.15172.55571.8445
H72.20362.23931.08742.55573.15171.8445

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 60.221 O1 C2 H4 115.150
O1 C2 H5 115.150 O1 C3 C2 60.221
O1 C3 H6 115.150 O1 C3 H7 115.150
C2 O1 C3 59.557 C2 C3 H6 119.059
C2 C3 H7 119.059 C3 C2 H4 119.059
C3 C2 H5 119.059 H4 C2 H5 116.010
H6 C3 H7 116.010
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability