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

using model chemistry: HF/CEP-121G*

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-121G*
 hartrees
Energy at 0K-28.949322
Energy at 298.15K 
HF Energy-28.949322
Nuclear repulsion energy42.808634
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-121G*
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 3283 2966 13.95 212.85 0.11 0.20
2 A1 1681 1518 6.26 2.63 0.20 0.33
3 A1 1406 1270 15.08 33.60 0.15 0.26
4 A1 1292 1167 9.80 3.38 0.19 0.33
5 A1 974 880 102.48 14.12 0.72 0.84
6 A2 3364 3039 0.00 112.01 0.75 0.86
7 A2 1273 1150 0.00 2.60 0.75 0.86
8 A2 1145 1035 0.00 0.08 0.75 0.86
9 B1 3379 3053 81.52 13.38 0.75 0.86
10 B1 1276 1152 8.85 10.10 0.75 0.86
11 B1 870 786 0.05 4.96 0.75 0.86
12 B2 3271 2955 63.05 8.65 0.75 0.86
13 B2 1630 1473 1.45 5.33 0.75 0.86
14 B2 1274 1151 0.10 2.49 0.75 0.86
15 B2 963 870 13.51 8.72 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13540.1 cm-1
Scaled (by 0.9034) Zero Point Vibrational Energy (zpe) 12232.1 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 HF/CEP-121G*
ABC
0.88239 0.74253 0.48037

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-121G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.840
C2 0.000 0.732 -0.368
C3 0.000 -0.732 -0.368
H4 0.913 1.269 -0.576
H5 -0.913 1.269 -0.576
H6 -0.913 -1.269 -0.576
H7 0.913 -1.269 -0.576

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.41201.41202.10912.10912.10912.1091
C21.41201.46371.07921.07922.20892.2089
C31.41201.46372.20892.20891.07921.0792
H42.10911.07922.20891.82523.12602.5378
H52.10911.07922.20891.82522.53783.1260
H62.10912.20891.07923.12602.53781.8252
H72.10912.20891.07922.53783.12601.8252

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 58.782 O1 C2 H4 115.032
O1 C2 H5 115.032 O1 C3 C2 58.782
O1 C3 H6 115.032 O1 C3 H7 115.032
C2 O1 C3 62.436 C2 C3 H6 119.844
C2 C3 H7 119.844 C3 C2 H4 119.844
C3 C2 H5 119.844 H4 C2 H5 115.474
H6 C3 H7 115.474
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.386      
2 C -0.131      
3 C -0.131      
4 H 0.162      
5 H 0.162      
6 H 0.162      
7 H 0.162      


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 -2.266 2.266
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.229 0.000 0.000
y 0.000 -16.070 0.000
z 0.000 0.000 -20.867
Traceless
 xyz
x 1.239 0.000 0.000
y 0.000 2.978 0.000
z 0.000 0.000 -4.217
Polar
3z2-r2-8.435
x2-y2-1.159
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.284 0.000 0.000
y 0.000 4.286 0.000
z 0.000 0.000 2.851


<r2> (average value of r2) Å2
<r2> 31.976
(<r2>)1/2 5.655