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

using model chemistry: HF/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-152.933532
Energy at 298.15K 
HF Energy-152.933532
Nuclear repulsion energy76.510318
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/Def2TZVPP
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 3257 2952 13.69 220.07 0.08 0.15
2 A1 1678 1521 4.05 2.23 0.17 0.29
3 A1 1414 1282 18.81 31.40 0.14 0.24
4 A1 1290 1169 4.23 3.31 0.18 0.31
5 A1 977 886 91.99 10.96 0.68 0.81
6 A2 3327 3015 0.00 106.68 0.75 0.86
7 A2 1275 1156 0.00 1.21 0.75 0.86
8 A2 1151 1044 0.00 0.07 0.75 0.86
9 B1 3344 3031 55.02 13.96 0.75 0.86
10 B1 1284 1164 8.22 5.72 0.75 0.86
11 B1 877 795 0.16 3.17 0.75 0.86
12 B2 3245 2941 50.16 7.99 0.75 0.86
13 B2 1630 1477 0.01 3.80 0.75 0.86
14 B2 1296 1175 0.01 0.76 0.75 0.86
15 B2 966 876 12.25 6.78 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13504.9 cm-1
Scaled (by 0.9064) Zero Point Vibrational Energy (zpe) 12240.8 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/Def2TZVPP
ABC
0.89754 0.75482 0.48917

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/Def2TZVPP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.832
C2 0.000 0.725 -0.363
C3 0.000 -0.725 -0.363
H4 0.908 1.259 -0.576
H5 -0.908 1.259 -0.576
H6 -0.908 -1.259 -0.576
H7 0.908 -1.259 -0.576

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.39781.39782.09592.09592.09592.0959
C21.39781.45001.07511.07512.19262.1926
C31.39781.45002.19262.19261.07511.0751
H42.09591.07512.19261.81683.10542.5185
H52.09591.07512.19261.81682.51853.1054
H62.09592.19261.07513.10542.51851.8168
H72.09592.19261.07512.51853.10541.8168

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 58.758 O1 C2 H4 115.272
O1 C2 H5 115.272 O1 C3 C2 58.758
O1 C3 H6 115.272 O1 C3 H7 115.272
C2 O1 C3 62.485 C2 C3 H6 119.796
C2 C3 H7 119.796 C3 C2 H4 119.796
C3 C2 H5 119.796 H4 C2 H5 115.331
H6 C3 H7 115.331
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.432      
2 C 0.111      
3 C 0.111      
4 H 0.052      
5 H 0.052      
6 H 0.052      
7 H 0.052      


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 -2.068 2.068
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.263 0.000 0.000
y 0.000 -16.248 0.000
z 0.000 0.000 -20.852
Traceless
 xyz
x 1.287 0.000 0.000
y 0.000 2.809 0.000
z 0.000 0.000 -4.097
Polar
3z2-r2-8.194
x2-y2-1.015
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.439 0.000 0.000
y 0.000 4.420 0.000
z 0.000 0.000 3.245


<r2> (average value of r2) Å2
<r2> 35.715
(<r2>)1/2 5.976