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

using model chemistry: HF/CEP-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/CEP-31G*
 hartrees
Energy at 0K-28.943484
Energy at 298.15K 
HF Energy-28.943484
Nuclear repulsion energy42.706109
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 HF/CEP-31G*
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 3320 2982 17.90 220.83 0.11 0.20
2 A1 1686 1514 6.77 9.30 0.11 0.20
3 A1 1415 1270 13.24 35.90 0.20 0.33
4 A1 1290 1158 9.60 3.75 0.24 0.39
5 A1 986 886 111.36 12.43 0.75 0.85
6 A2 3397 3050 0.00 108.50 0.75 0.86
7 A2 1263 1134 0.00 2.77 0.75 0.86
8 A2 1139 1023 0.00 0.11 0.75 0.86
9 B1 3415 3066 106.94 14.30 0.75 0.86
10 B1 1270 1141 9.62 10.80 0.75 0.86
11 B1 865 777 0.18 6.08 0.75 0.86
12 B2 3307 2970 76.32 9.74 0.75 0.86
13 B2 1625 1460 1.29 4.65 0.75 0.86
14 B2 1267 1137 0.01 0.84 0.75 0.86
15 B2 973 874 11.78 13.12 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13608.2 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 12220.2 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 HF/CEP-31G*
ABC
0.88391 0.73450 0.47827

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.838
C2 0.000 0.736 -0.367
C3 0.000 -0.736 -0.367
H4 0.917 1.275 -0.575
H5 -0.917 1.275 -0.575
H6 -0.917 -1.275 -0.575
H7 0.917 -1.275 -0.575

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.41221.41222.11262.11262.11262.1126
C21.41221.47281.08331.08332.21992.2199
C31.41221.47282.21992.21991.08331.0833
H42.11261.08332.21991.83353.13992.5491
H52.11261.08332.21991.83352.54913.1399
H62.11262.21991.08333.13992.54911.8335
H72.11262.21991.08332.54913.13991.8335

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 58.571 O1 C2 H4 115.045
O1 C2 H5 115.045 O1 C3 C2 58.571
O1 C3 H6 115.045 O1 C3 H7 115.045
C2 O1 C3 62.858 C2 C3 H6 119.786
C2 C3 H7 119.786 C3 C2 H4 119.786
C3 C2 H5 119.786 H4 C2 H5 115.614
H6 C3 H7 115.614
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.309      
2 C -0.143      
3 C -0.143      
4 H 0.149      
5 H 0.149      
6 H 0.149      
7 H 0.149      


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 -2.288 2.288
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.030 0.000 0.000
y 0.000 -16.025 0.000
z 0.000 0.000 -20.854
Traceless
 xyz
x 1.410 0.000 0.000
y 0.000 2.917 0.000
z 0.000 0.000 -4.327
Polar
3z2-r2-8.653
x2-y2-1.005
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.791 0.000 0.000
y 0.000 4.118 0.000
z 0.000 0.000 2.632


<r2> (average value of r2) Å2
<r2> 32.038
(<r2>)1/2 5.660