return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: wB97X-D/SDD

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at wB97X-D/SDD
 hartrees
Energy at 0K-153.706396
Energy at 298.15K 
HF Energy-153.706396
Nuclear repulsion energy73.514561
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 wB97X-D/SDD
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 3181 3181 11.98 215.08 0.08 0.14
2 A1 1554 1554 0.24 4.35 0.52 0.68
3 A1 1288 1288 10.62 31.85 0.14 0.25
4 A1 1151 1151 5.80 6.77 0.21 0.35
5 A1 841 841 63.51 13.06 0.68 0.81
6 A2 3274 3274 0.00 87.78 0.75 0.86
7 A2 1196 1196 0.00 4.91 0.75 0.86
8 A2 1018 1018 0.00 0.01 0.75 0.86
9 B1 3293 3293 56.47 12.72 0.75 0.86
10 B1 1132 1132 1.45 13.00 0.75 0.86
11 B1 836 836 2.38 8.12 0.75 0.86
12 B2 3167 3167 39.81 12.92 0.75 0.86
13 B2 1528 1528 2.02 5.23 0.75 0.86
14 B2 1161 1161 13.19 0.75 0.75 0.86
15 B2 797 797 5.19 13.74 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12708.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12708.5 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 wB97X-D/SDD
ABC
0.79600 0.72293 0.44743

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/SDD

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.892
C2 0.000 0.745 -0.392
C3 0.000 -0.745 -0.392
H4 0.920 1.279 -0.608
H5 -0.920 1.279 -0.608
H6 -0.920 -1.279 -0.608
H7 0.920 -1.279 -0.608

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.48421.48422.17532.17532.17532.1753
C21.48421.48971.08531.08532.23352.2335
C31.48421.48972.23352.23351.08531.0853
H42.17531.08532.23351.83943.15062.5579
H52.17531.08532.23351.83942.55793.1506
H62.17532.23351.08533.15062.55791.8394
H72.17532.23351.08532.55793.15061.8394

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 59.877 O1 C2 H4 114.797
O1 C2 H5 114.797 O1 C3 C2 59.877
O1 C3 H6 114.797 O1 C3 H7 114.797
C2 O1 C3 60.245 C2 C3 H6 119.479
C2 C3 H7 119.479 C3 C2 H4 119.479
C3 C2 H5 119.479 H4 C2 H5 115.861
H6 C3 H7 115.861
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/SDD Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.349      
2 C -0.256      
3 C -0.256      
4 H 0.215      
5 H 0.215      
6 H 0.215      
7 H 0.215      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -2.667 2.667
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.908 0.000 0.000
y 0.000 -15.806 0.000
z 0.000 0.000 -21.272
Traceless
 xyz
x 1.631 0.000 0.000
y 0.000 3.284 0.000
z 0.000 0.000 -4.915
Polar
3z2-r2-9.831
x2-y2-1.102
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.877 0.000 0.000
y 0.000 4.098 0.000
z 0.000 0.000 2.922


<r2> (average value of r2) Å2
<r2> 37.509
(<r2>)1/2 6.124