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

using model chemistry: B2PLYP/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 B2PLYP/3-21G
 hartrees
Energy at 0K-152.715100
Energy at 298.15K 
HF Energy-152.610979
Nuclear repulsion energy72.945523
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 B2PLYP/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 3167 3167 3.40 164.79 0.10 0.18
2 A1 1589 1589 0.04 7.46 0.73 0.84
3 A1 1225 1225 6.21 14.70 0.11 0.20
4 A1 1136 1136 6.82 8.98 0.31 0.48
5 A1 815 815 22.75 10.65 0.73 0.84
6 A2 3244 3244 0.00 93.56 0.75 0.86
7 A2 1213 1213 0.00 6.30 0.75 0.86
8 A2 1001 1001 0.00 0.00 0.75 0.86
9 B1 3263 3263 39.92 12.81 0.75 0.86
10 B1 1116 1116 0.75 19.03 0.75 0.86
11 B1 851 851 0.05 11.52 0.75 0.86
12 B2 3156 3156 21.29 7.36 0.75 0.86
13 B2 1572 1572 0.07 5.96 0.75 0.86
14 B2 1138 1138 15.04 3.09 0.75 0.86
15 B2 768 768 4.33 7.90 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12626.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12626.9 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 B2PLYP/3-21G
ABC
0.76608 0.72676 0.43906

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.913
C2 0.000 0.744 -0.399
C3 0.000 -0.744 -0.399
H4 0.919 1.270 -0.628
H5 -0.919 1.270 -0.628
H6 -0.919 -1.270 -0.628
H7 0.919 -1.270 -0.628

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.50831.50832.19832.19832.19832.1983
C21.50831.48831.08321.08322.22572.2257
C31.50831.48832.22572.22571.08321.0832
H42.19831.08322.22571.83753.13522.5402
H52.19831.08322.22571.83752.54023.1352
H62.19832.22571.08323.13522.54021.8375
H72.19832.22571.08322.54023.13521.8375

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 60.438 O1 C2 H4 115.067
O1 C2 H5 115.067 O1 C3 C2 60.438
O1 C3 H6 115.067 O1 C3 H7 115.067
C2 O1 C3 59.124 C2 C3 H6 119.049
C2 C3 H7 119.049 C3 C2 H4 119.049
C3 C2 H5 119.049 H4 C2 H5 116.030
H6 C3 H7 116.030
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.425      
2 C -0.205      
3 C -0.205      
4 H 0.208      
5 H 0.208      
6 H 0.208      
7 H 0.208      


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 -2.345 2.345
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.375 0.000 0.000
y 0.000 -16.489 0.000
z 0.000 0.000 -20.769
Traceless
 xyz
x 1.254 0.000 0.000
y 0.000 2.583 0.000
z 0.000 0.000 -3.836
Polar
3z2-r2-7.673
x2-y2-0.886
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.914 0.000 0.000
y 0.000 4.001 0.000
z 0.000 0.000 2.518


<r2> (average value of r2) Å2
<r2> 38.003
(<r2>)1/2 6.165