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

using model chemistry: B3LYP/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3LYP/3-21G
 hartrees
Energy at 0K-152.926931
Energy at 298.15K 
HF Energy-152.926931
Nuclear repulsion energy73.125226
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 B3LYP/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3132 3022 4.12 169.22 0.10 0.18
2 A1 1570 1515 0.06 7.16 0.74 0.85
3 A1 1225 1182 6.56 18.05 0.13 0.23
4 A1 1127 1087 7.01 5.90 0.38 0.55
5 A1 827 798 26.66 10.60 0.74 0.85
6 A2 3206 3094 0.00 97.26 0.75 0.86
7 A2 1197 1155 0.00 6.41 0.75 0.86
8 A2 991 956 0.00 0.00 0.75 0.86
9 B1 3226 3113 44.89 13.48 0.75 0.86
10 B1 1110 1071 0.69 19.22 0.75 0.86
11 B1 840 811 0.06 11.62 0.75 0.86
12 B2 3122 3013 23.74 7.87 0.75 0.86
13 B2 1552 1497 0.01 6.25 0.75 0.86
14 B2 1125 1085 15.11 3.18 0.75 0.86
15 B2 781 754 5.74 7.45 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12515.5 cm-1
Scaled (by 0.9649) Zero Point Vibrational Energy (zpe) 12076.2 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 B3LYP/3-21G
ABC
0.77512 0.72585 0.44198

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.906
C2 0.000 0.744 -0.395
C3 0.000 -0.744 -0.395
H4 0.921 1.271 -0.628
H5 -0.921 1.271 -0.628
H6 -0.921 -1.271 -0.628
H7 0.921 -1.271 -0.628

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.49921.49922.19452.19452.19452.1945
C21.49921.48871.08571.08572.22772.2277
C31.49921.48872.22772.22771.08571.0857
H42.19451.08572.22771.84103.13862.5419
H52.19451.08572.22771.84102.54193.1386
H62.19452.22771.08573.13862.54191.8410
H72.19452.22771.08572.54193.13861.8410

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 60.233 O1 C2 H4 115.263
O1 C2 H5 115.263 O1 C3 C2 60.233
O1 C3 H6 115.263 O1 C3 H7 115.263
C2 O1 C3 59.534 C2 C3 H6 119.017
C2 C3 H7 119.017 C3 C2 H4 119.017
C3 C2 H5 119.017 H4 C2 H5 115.954
H6 C3 H7 115.954
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.423      
2 C -0.204      
3 C -0.204      
4 H 0.208      
5 H 0.208      
6 H 0.208      
7 H 0.208      


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 -2.281 2.281
CHELPG        
AIM        
ESP 0.023 0.000 -2.318 2.318


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.219 0.000 0.000
y 0.000 -16.370 0.000
z 0.000 0.000 -20.642
Traceless
 xyz
x 1.288 0.000 0.000
y 0.000 2.561 0.000
z 0.000 0.000 -3.848
Polar
3z2-r2-7.696
x2-y2-0.849
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.944 0.000 0.000
y 0.000 4.033 0.000
z 0.000 0.000 2.503


<r2> (average value of r2) Å2
<r2> 37.810
(<r2>)1/2 6.149