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

using model chemistry: B3PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3PW91/3-21G*
 hartrees
Energy at 0K-152.871336
Energy at 298.15K 
HF Energy-152.871336
Nuclear repulsion energy73.293177
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 B3PW91/3-21G*
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 3139 3012 3.97      
2 A1 1565 1502 0.02      
3 A1 1235 1185 7.12      
4 A1 1131 1085 10.24      
5 A1 846 811 28.55      
6 A2 3217 3086 0.00      
7 A2 1194 1145 0.00      
8 A2 994 953 0.00      
9 B1 3237 3105 41.19      
10 B1 1114 1068 0.48      
11 B1 843 809 0.01      
12 B2 3129 3002 22.67      
13 B2 1543 1481 0.02      
14 B2 1126 1080 16.89      
15 B2 802 769 6.16      

Unscaled Zero Point Vibrational Energy (zpe) 12555.9 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 12046.1 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 B3PW91/3-21G*
ABC
0.78060 0.72757 0.44464

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.902
C2 0.000 0.743 -0.393
C3 0.000 -0.743 -0.393
H4 0.922 1.269 -0.625
H5 -0.922 1.269 -0.625
H6 -0.922 -1.269 -0.625
H7 0.922 -1.269 -0.625

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.49351.49352.18952.18952.18952.1895
C21.49351.48611.08651.08652.22542.2254
C31.49351.48612.22542.22541.08651.0865
H42.18951.08652.22541.84383.13722.5382
H52.18951.08652.22541.84382.53823.1372
H62.18952.22541.08653.13722.53821.8438
H72.18952.22541.08652.53823.13721.8438

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 60.164 O1 C2 H4 115.222
O1 C2 H5 115.222 O1 C3 C2 60.164
O1 C3 H6 115.222 O1 C3 H7 115.222
C2 O1 C3 59.673 C2 C3 H6 118.959
C2 C3 H7 118.959 C3 C2 H4 118.959
C3 C2 H5 118.959 H4 C2 H5 116.100
H6 C3 H7 116.100
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.429      
2 C -0.247      
3 C -0.247      
4 H 0.231      
5 H 0.231      
6 H 0.231      
7 H 0.231      


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 -2.318 2.318
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.099 0.000 0.000
y 0.000 -16.250 0.000
z 0.000 0.000 -20.683
Traceless
 xyz
x 1.367 0.000 0.000
y 0.000 2.641 0.000
z 0.000 0.000 -4.008
Polar
3z2-r2-8.016
x2-y2-0.849
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.949 0.000 0.000
y 0.000 4.033 0.000
z 0.000 0.000 2.494


<r2> (average value of r2) Å2
<r2> 37.649
(<r2>)1/2 6.136