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

using model chemistry: BLYP/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 BLYP/3-21G
 hartrees
Energy at 0K-152.871689
Energy at 298.15K 
HF Energy-152.871689
Nuclear repulsion energy72.310795
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 BLYP/3-21G
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 3035 3019 6.54 179.69 0.09 0.17
2 A1 1531 1522 0.23 8.91 0.70 0.82
3 A1 1178 1171 5.40 16.00 0.12 0.21
4 A1 1082 1076 5.97 6.08 0.45 0.62
5 A1 792 787 22.48 10.26 0.75 0.85
6 A2 3104 3087 0.00 105.43 0.75 0.86
7 A2 1161 1155 0.00 7.32 0.75 0.86
8 A2 952 947 0.00 0.00 0.75 0.86
9 B1 3124 3107 61.46 16.34 0.75 0.86
10 B1 1068 1062 0.15 20.17 0.75 0.86
11 B1 811 807 0.27 13.98 0.75 0.86
12 B2 3026 3010 31.59 9.58 0.75 0.86
13 B2 1516 1507 0.33 7.27 0.75 0.86
14 B2 1075 1069 15.65 4.10 0.75 0.86
15 B2 725 721 7.74 5.44 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12090.2 cm-1
Scaled (by 0.9945) Zero Point Vibrational Energy (zpe) 12023.7 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 BLYP/3-21G
ABC
0.75288 0.71424 0.43154

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.921
C2 0.000 0.751 -0.401
C3 0.000 -0.751 -0.401
H4 0.927 1.281 -0.639
H5 -0.927 1.281 -0.639
H6 -0.927 -1.281 -0.639
H7 0.927 -1.281 -0.639

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.52011.52012.22152.22152.22152.2215
C21.52011.50131.09431.09432.24582.2458
C31.52011.50132.24582.24581.09431.0943
H42.22151.09432.24581.85403.16242.5619
H52.22151.09432.24581.85402.56193.1624
H62.22152.24581.09433.16242.56191.8540
H72.22152.24581.09432.56193.16241.8540

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 60.409 O1 C2 H4 115.394
O1 C2 H5 115.394 O1 C3 C2 60.409
O1 C3 H6 115.394 O1 C3 H7 115.394
C2 O1 C3 59.182 C2 C3 H6 118.986
C2 C3 H7 118.986 C3 C2 H4 118.986
C3 C2 H5 118.986 H4 C2 H5 115.804
H6 C3 H7 115.804
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.380      
2 C -0.192      
3 C -0.192      
4 H 0.191      
5 H 0.191      
6 H 0.191      
7 H 0.191      


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 -2.110 2.110
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.351 0.000 0.000
y 0.000 -16.546 0.000
z 0.000 0.000 -20.483
Traceless
 xyz
x 1.164 0.000 0.000
y 0.000 2.371 0.000
z 0.000 0.000 -3.535
Polar
3z2-r2-7.070
x2-y2-0.805
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.040 0.000 0.000
y 0.000 4.128 0.000
z 0.000 0.000 2.595


<r2> (average value of r2) Å2
<r2> 38.433
(<r2>)1/2 6.199