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

using model chemistry: HF/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 HF/3-21G*
 hartrees
Energy at 0K-152.000703
Energy at 298.15K 
HF Energy-152.000703
Nuclear repulsion energy74.332113
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/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 3329 3005 1.87 164.04 0.11 0.20
2 A1 1681 1518 0.01 4.94 0.67 0.80
3 A1 1325 1196 12.37 17.50 0.14 0.25
4 A1 1248 1127 1.61 17.52 0.20 0.33
5 A1 887 801 43.63 12.54 0.73 0.85
6 A2 3407 3075 0.00 94.87 0.75 0.86
7 A2 1296 1170 0.00 5.33 0.75 0.86
8 A2 1096 989 0.00 0.00 0.75 0.86
9 B1 3425 3092 32.04 9.25 0.75 0.86
10 B1 1220 1101 4.35 18.40 0.75 0.86
11 B1 908 819 0.00 7.98 0.75 0.86
12 B2 3315 2992 21.90 5.21 0.75 0.86
13 B2 1655 1494 0.02 4.21 0.75 0.86
14 B2 1268 1144 10.31 1.57 0.75 0.86
15 B2 891 805 2.42 16.64 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13476.1 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 12163.5 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/3-21G*
ABC
0.81214 0.74012 0.45722

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.883
C2 0.000 0.737 -0.388
C3 0.000 -0.737 -0.388
H4 0.909 1.260 -0.603
H5 -0.909 1.260 -0.603
H6 -0.909 -1.260 -0.603
H7 0.909 -1.260 -0.603

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.46941.46942.15022.15022.15022.1502
C21.46941.47441.07071.07072.20512.2051
C31.46941.47442.20512.20511.07071.0707
H42.15021.07072.20511.81833.10792.5204
H52.15021.07072.20511.81832.52043.1079
H62.15022.20511.07073.10792.52041.8183
H72.15022.20511.07072.52043.10791.8183

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 59.889 O1 C2 H4 114.754
O1 C2 H5 114.754 O1 C3 C2 59.889
O1 C3 H6 114.754 O1 C3 H7 114.754
C2 O1 C3 60.222 C2 C3 H6 119.243
C2 C3 H7 119.243 C3 C2 H4 119.243
C3 C2 H5 119.243 H4 C2 H5 116.239
H6 C3 H7 116.239
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.552      
2 C -0.191      
3 C -0.191      
4 H 0.234      
5 H 0.234      
6 H 0.234      
7 H 0.234      


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 -2.784 2.784
CHELPG 0.000 0.000 -2.803 2.803
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.255 0.000 0.000
y 0.000 -16.192 0.000
z 0.000 0.000 -21.335
Traceless
 xyz
x 1.508 0.000 0.000
y 0.000 3.104 0.000
z 0.000 0.000 -4.612
Polar
3z2-r2-9.223
x2-y2-1.064
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.799 0.000 0.000
y 0.000 3.992 0.000
z 0.000 0.000 2.366


<r2> (average value of r2) Å2
<r2> 37.086
(<r2>)1/2 6.090