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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-28.860663
Energy at 298.15K 
HF Energy-28.860663
Nuclear repulsion energy41.915080
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 3360 3028 10.51 237.75 0.11 0.19
2 A1 1667 1502 0.67 10.49 0.22 0.36
3 A1 1376 1240 8.32 38.27 0.17 0.29
4 A1 1255 1131 0.17 15.97 0.17 0.29
5 A1 902 813 102.29 16.97 0.62 0.76
6 A2 3448 3108 0.00 109.70 0.75 0.86
7 A2 1284 1157 0.00 3.66 0.75 0.86
8 A2 1112 1002 0.00 0.01 0.75 0.86
9 B1 3468 3126 94.80 13.52 0.75 0.86
10 B1 1226 1105 7.10 13.41 0.75 0.86
11 B1 888 801 1.76 7.15 0.75 0.86
12 B2 3343 3013 53.33 9.83 0.75 0.86
13 B2 1628 1467 0.34 3.87 0.75 0.86
14 B2 1275 1149 4.47 0.54 0.75 0.86
15 B2 885 798 5.60 25.73 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13557.2 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 12220.5 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
0.82127 0.72599 0.45522

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 0.876
C2 0.000 0.744 -0.387
C3 0.000 -0.744 -0.387
H4 0.913 1.279 -0.591
H5 -0.913 1.279 -0.591
H6 -0.913 -1.279 -0.591
H7 0.913 -1.279 -0.591

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.46631.46632.14942.14942.14942.1494
C21.46631.48731.07721.07722.22792.2279
C31.46631.48732.22792.22791.07721.0772
H42.14941.07722.22791.82513.14172.5573
H52.14941.07722.22791.82512.55733.1417
H62.14942.22791.07723.14172.55731.8251
H72.14942.22791.07722.55733.14171.8251

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 59.526 O1 C2 H4 114.489
O1 C2 H5 114.489 O1 C3 C2 59.526
O1 C3 H6 114.489 O1 C3 H7 114.489
C2 O1 C3 60.947 C2 C3 H6 119.779
C2 C3 H7 119.779 C3 C2 H4 119.779
C3 C2 H5 119.779 H4 C2 H5 115.813
H6 C3 H7 115.813
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 -0.384      
2 C -0.116      
3 C -0.116      
4 H 0.154      
5 H 0.154      
6 H 0.154      
7 H 0.154      


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 -3.002 3.002
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.073 0.000 0.000
y 0.000 -15.954 0.000
z 0.000 0.000 -21.935
Traceless
 xyz
x 1.871 0.000 0.000
y 0.000 3.551 0.000
z 0.000 0.000 -5.422
Polar
3z2-r2-10.843
x2-y2-1.120
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.565 0.000 0.000
y 0.000 4.169 0.000
z 0.000 0.000 2.807


<r2> (average value of r2) Å2
<r2> 32.942
(<r2>)1/2 5.740