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: B1B95/6-311+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 B1B95/6-311+G(3df,2p)
 hartrees
Energy at 0K-153.778439
Energy at 298.15K 
HF Energy-153.778439
Nuclear repulsion energy75.898039
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 B1B95/6-311+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 3116 3116 16.16 221.60 0.07 0.13
2 A1 1547 1547 3.43 3.30 0.19 0.32
3 A1 1331 1331 17.18 29.31 0.12 0.22
4 A1 1164 1164 0.04 2.25 0.27 0.43
5 A1 932 932 70.29 8.08 0.69 0.82
6 A2 3194 3194 0.00 108.58 0.75 0.86
7 A2 1173 1173 0.00 1.31 0.75 0.86
8 A2 1058 1058 0.00 0.05 0.75 0.86
9 B1 3209 3209 38.85 20.32 0.75 0.86
10 B1 1184 1184 4.48 3.93 0.75 0.86
11 B1 819 819 0.24 2.66 0.75 0.86
12 B2 3108 3108 34.73 9.59 0.75 0.86
13 B2 1504 1504 0.24 3.42 0.75 0.86
14 B2 1169 1169 0.20 0.29 0.75 0.86
15 B2 908 908 10.55 3.61 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12706.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12706.3 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 B1B95/6-311+G(3df,2p)
ABC
0.87602 0.74825 0.48172

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-311+G(3df,2p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.843
C2 0.000 0.728 -0.367
C3 0.000 -0.728 -0.367
H4 0.917 1.261 -0.585
H5 -0.917 1.261 -0.585
H6 -0.917 -1.261 -0.585
H7 0.917 -1.261 -0.585

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.41221.41222.11412.11412.11412.1141
C21.41221.45641.08271.08272.20152.2015
C31.41221.45642.20152.20151.08271.0827
H42.11411.08272.20151.83383.11892.5228
H52.11411.08272.20151.83382.52283.1189
H62.11412.20151.08273.11892.52281.8338
H72.11412.20151.08272.52283.11891.8338

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 58.960 O1 C2 H4 115.218
O1 C2 H5 115.218 O1 C3 C2 58.960
O1 C3 H6 115.218 O1 C3 H7 115.218
C2 O1 C3 62.079 C2 C3 H6 119.503
C2 C3 H7 119.503 C3 C2 H4 119.503
C3 C2 H5 119.503 H4 C2 H5 115.736
H6 C3 H7 115.736
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-311+G(3df,2p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.518      
2 C -0.032      
3 C -0.032      
4 H 0.146      
5 H 0.146      
6 H 0.146      
7 H 0.146      


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 -1.868 1.868
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.325 0.000 0.000
y 0.000 -16.372 0.000
z 0.000 0.000 -20.841
Traceless
 xyz
x 1.282 0.000 0.000
y 0.000 2.711 0.000
z 0.000 0.000 -3.993
Polar
3z2-r2-7.986
x2-y2-0.953
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.803 0.000 0.000
y 0.000 4.678 0.000
z 0.000 0.000 3.764


<r2> (average value of r2) Å2
<r2> 36.113
(<r2>)1/2 6.009