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

using model chemistry: PBE1PBE/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 PBE1PBE/3-21G*
 hartrees
Energy at 0K-152.749930
Energy at 298.15K 
HF Energy-152.749930
Nuclear repulsion energy73.452953
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 PBE1PBE/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 3155 3028 3.35 167.34 0.10 0.18
2 A1 1569 1506 0.01 5.97 0.75 0.85
3 A1 1246 1196 7.02 20.45 0.14 0.25
4 A1 1139 1093 10.75 4.00 0.42 0.59
5 A1 859 824 29.57 10.69 0.74 0.85
6 A2 3234 3104 0.00 93.91 0.75 0.86
7 A2 1197 1149 0.00 6.02 0.75 0.86
8 A2 1000 960 0.00 0.00 0.75 0.86
9 B1 3254 3123 36.44 12.88 0.75 0.86
10 B1 1121 1076 0.64 19.01 0.75 0.86
11 B1 845 811 0.01 10.89 0.75 0.86
12 B2 3144 3018 19.83 7.50 0.75 0.86
13 B2 1546 1484 0.07 5.99 0.75 0.86
14 B2 1133 1087 17.02 2.86 0.75 0.86
15 B2 821 788 5.95 7.67 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12631.0 cm-1
Scaled (by 0.9598) Zero Point Vibrational Energy (zpe) 12123.3 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 PBE1PBE/3-21G*
ABC
0.78587 0.72911 0.44692

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.899
C2 0.000 0.742 -0.391
C3 0.000 -0.742 -0.391
H4 0.922 1.267 -0.623
H5 -0.922 1.267 -0.623
H6 -0.922 -1.267 -0.623
H7 0.922 -1.267 -0.623

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.48841.48842.18462.18462.18462.1846
C21.48841.48431.08601.08602.22302.2230
C31.48841.48432.22302.22301.08601.0860
H42.18461.08602.22301.84373.13442.5348
H52.18461.08602.22301.84372.53483.1344
H62.18462.22301.08603.13442.53481.8437
H72.18462.22301.08602.53483.13441.8437

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 60.091 O1 C2 H4 115.223
O1 C2 H5 115.223 O1 C3 C2 60.091
O1 C3 H6 115.223 O1 C3 H7 115.223
C2 O1 C3 59.818 C2 C3 H6 118.922
C2 C3 H7 118.922 C3 C2 H4 118.922
C3 C2 H5 118.922 H4 C2 H5 116.176
H6 C3 H7 116.176
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.435      
2 C -0.253      
3 C -0.253      
4 H 0.235      
5 H 0.235      
6 H 0.235      
7 H 0.235      


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 -2.332 2.332
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.124 0.000 0.000
y 0.000 -16.281 0.000
z 0.000 0.000 -20.750
Traceless
 xyz
x 1.392 0.000 0.000
y 0.000 2.656 0.000
z 0.000 0.000 -4.048
Polar
3z2-r2-8.096
x2-y2-0.843
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.934 0.000 0.000
y 0.000 4.015 0.000
z 0.000 0.000 2.475


<r2> (average value of r2) Å2
<r2> 37.563
(<r2>)1/2 6.129