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

using model chemistry: mPW1PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/3-21G*
 hartrees
Energy at 0K-152.887341
Energy at 298.15K 
HF Energy-152.887341
Nuclear repulsion energy73.466492
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 mPW1PW91/3-21G*
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 3162 3002 3.43 167.92 0.10 0.18
2 A1 1574 1495 0.01 5.94 0.75 0.85
3 A1 1245 1183 7.32 20.21 0.14 0.25
4 A1 1141 1084 10.52 4.31 0.40 0.57
5 A1 855 812 29.62 10.68 0.74 0.85
6 A2 3241 3077 0.00 94.87 0.75 0.86
7 A2 1201 1141 0.00 5.91 0.75 0.86
8 A2 1002 952 0.00 0.00 0.75 0.86
9 B1 3260 3096 37.18 12.87 0.75 0.86
10 B1 1123 1066 0.66 18.88 0.75 0.86
11 B1 848 806 0.00 10.79 0.75 0.86
12 B2 3151 2992 20.74 7.48 0.75 0.86
13 B2 1551 1473 0.06 5.92 0.75 0.86
14 B2 1136 1079 16.65 2.81 0.75 0.86
15 B2 816 775 5.69 7.87 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12652.8 cm-1
Scaled (by 0.9496) Zero Point Vibrational Energy (zpe) 12015.1 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 mPW1PW91/3-21G*
ABC
0.78546 0.72996 0.44689

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/3-21G*

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 -0.392
C3 0.000 -0.742 -0.392
H4 0.921 1.267 -0.623
H5 -0.921 1.267 -0.623
H6 -0.921 -1.267 -0.623
H7 0.921 -1.267 -0.623

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.48911.48912.18362.18362.18362.1836
C21.48911.48371.08461.08462.22152.2215
C31.48911.48372.22152.22151.08461.0846
H42.18361.08462.22151.84133.13192.5335
H52.18361.08462.22151.84132.53353.1319
H62.18362.22151.08463.13192.53351.8413
H72.18362.22151.08462.53353.13191.8413

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 60.121 O1 C2 H4 115.180
O1 C2 H5 115.180 O1 C3 C2 60.121
O1 C3 H6 115.180 O1 C3 H7 115.180
C2 O1 C3 59.758 C2 C3 H6 118.946
C2 C3 H7 118.946 C3 C2 H4 118.946
C3 C2 H5 118.946 H4 C2 H5 116.174
H6 C3 H7 116.174
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.438      
2 C -0.251      
3 C -0.251      
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 -2.350 2.350
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.079 0.000 0.000
y 0.000 -16.221 0.000
z 0.000 0.000 -20.718
Traceless
 xyz
x 1.390 0.000 0.000
y 0.000 2.678 0.000
z 0.000 0.000 -4.068
Polar
3z2-r2-8.136
x2-y2-0.858
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.919 0.000 0.000
y 0.000 4.009 0.000
z 0.000 0.000 2.474


<r2> (average value of r2) Å2
<r2> 37.522
(<r2>)1/2 6.126