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

using model chemistry: B3LYP/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 B3LYP/CEP-121G
 hartrees
Energy at 0K-29.581922
Energy at 298.15K 
HF Energy-29.581922
Nuclear repulsion energy41.184161
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/CEP-121G
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 3093 3014 9.95 227.88 0.09 0.17
2 A1 1521 1483 0.72 3.76 0.74 0.85
3 A1 1254 1222 7.46 31.68 0.12 0.21
4 A1 1118 1089 2.65 7.42 0.32 0.48
5 A1 812 791 61.51 14.08 0.70 0.83
6 A2 3189 3108 0.00 116.88 0.75 0.86
7 A2 1174 1144 0.00 4.15 0.75 0.86
8 A2 1001 975 0.00 0.00 0.75 0.86
9 B1 3207 3126 64.79 16.32 0.75 0.86
10 B1 1104 1076 2.43 14.27 0.75 0.86
11 B1 815 794 0.40 8.12 0.75 0.86
12 B2 3081 3002 38.79 11.06 0.75 0.86
13 B2 1501 1463 0.20 5.82 0.75 0.86
14 B2 1122 1093 11.62 4.17 0.75 0.86
15 B2 743 724 7.76 8.72 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12367.2 cm-1
Scaled (by 0.9745) Zero Point Vibrational Energy (zpe) 12051.8 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 B3LYP/CEP-121G
ABC
0.77449 0.71484 0.43815

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-121G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.906
C2 0.000 0.749 -0.400
C3 0.000 -0.749 -0.400
H4 0.923 1.286 -0.611
H5 -0.923 1.286 -0.611
H6 -0.923 -1.286 -0.611
H7 0.923 -1.286 -0.611

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.50541.50542.19212.19212.19212.1921
C21.50541.49891.08851.08852.24492.2449
C31.50541.49892.24492.24491.08851.0885
H42.19211.08852.24491.84673.16612.5718
H52.19211.08852.24491.84672.57183.1661
H62.19212.24491.08853.16612.57181.8467
H72.19212.24491.08852.57183.16611.8467

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 60.145 O1 C2 H4 114.406
O1 C2 H5 114.406 O1 C3 C2 60.145
O1 C3 H6 114.406 O1 C3 H7 114.406
C2 O1 C3 59.711 C2 C3 H6 119.529
C2 C3 H7 119.529 C3 C2 H4 119.529
C3 C2 H5 119.529 H4 C2 H5 116.057
H6 C3 H7 116.057
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.294      
2 C -0.151      
3 C -0.151      
4 H 0.149      
5 H 0.149      
6 H 0.149      
7 H 0.149      


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 -2.576 2.576
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.355 0.000 0.000
y 0.000 -16.298 0.000
z 0.000 0.000 -21.456
Traceless
 xyz
x 1.522 0.000 0.000
y 0.000 3.108 0.000
z 0.000 0.000 -4.630
Polar
3z2-r2-9.260
x2-y2-1.058
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.360 0.000 0.000
y 0.000 4.604 0.000
z 0.000 0.000 3.289


<r2> (average value of r2) Å2
<r2> 33.684
(<r2>)1/2 5.804