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

using model chemistry: HF/TZVP

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/TZVP
 hartrees
Energy at 0K-152.921699
Energy at 298.15K 
HF Energy-152.921699
Nuclear repulsion energy76.415135
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/TZVP
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 3261 2963 11.41 215.50 0.10 0.18
2 A1 1678 1524 4.45 2.39 0.20 0.33
3 A1 1410 1281 18.15 31.88 0.14 0.25
4 A1 1290 1172 4.88 2.85 0.18 0.31
5 A1 971 882 95.64 12.96 0.70 0.83
6 A2 3335 3030 0.00 107.34 0.75 0.86
7 A2 1278 1161 0.00 1.71 0.75 0.86
8 A2 1150 1045 0.00 0.10 0.75 0.86
9 B1 3351 3044 55.84 14.10 0.75 0.86
10 B1 1284 1167 9.16 7.66 0.75 0.86
11 B1 881 800 0.07 4.34 0.75 0.86
12 B2 3250 2953 44.83 8.36 0.75 0.86
13 B2 1631 1482 0.03 4.80 0.75 0.86
14 B2 1285 1168 0.38 1.97 0.75 0.86
15 B2 965 877 11.10 7.95 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13508.7 cm-1
Scaled (by 0.9086) Zero Point Vibrational Energy (zpe) 12274.0 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/TZVP
ABC
0.89561 0.75264 0.48795

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.833
C2 0.000 0.726 -0.363
C3 0.000 -0.726 -0.363
H4 0.910 1.260 -0.576
H5 -0.910 1.260 -0.576
H6 -0.910 -1.260 -0.576
H7 0.910 -1.260 -0.576

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.39951.39952.09792.09792.09792.0979
C21.39951.45251.07621.07622.19532.1953
C31.39951.45252.19532.19531.07621.0762
H42.09791.07622.19531.81953.10872.5206
H52.09791.07622.19531.81952.52063.1087
H62.09792.19531.07623.10872.52061.8195
H72.09792.19531.07622.52063.10871.8195

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 58.740 O1 C2 H4 115.245
O1 C2 H5 115.245 O1 C3 C2 58.740
O1 C3 H6 115.245 O1 C3 H7 115.245
C2 O1 C3 62.521 C2 C3 H6 119.754
C2 C3 H7 119.754 C3 C2 H4 119.754
C3 C2 H5 119.754 H4 C2 H5 115.421
H6 C3 H7 115.421
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.327      
2 C -0.012      
3 C -0.012      
4 H 0.088      
5 H 0.088      
6 H 0.088      
7 H 0.088      


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 -2.244 2.244
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.273 0.000 0.000
y 0.000 -16.201 0.000
z 0.000 0.000 -20.978
Traceless
 xyz
x 1.317 0.000 0.000
y 0.000 2.924 0.000
z 0.000 0.000 -4.241
Polar
3z2-r2-8.482
x2-y2-1.072
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.330 0.000 0.000
y 0.000 4.330 0.000
z 0.000 0.000 2.997


<r2> (average value of r2) Å2
<r2> 35.792
(<r2>)1/2 5.983