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

using model chemistry: mPW1PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/6-31G*
 hartrees
Energy at 0K-153.748206
Energy at 298.15K 
HF Energy-153.748206
Nuclear repulsion energy75.520617
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 mPW1PW91/6-31G*
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 3141 2979 12.01 194.84 0.10 0.17
2 A1 1582 1501 4.26 3.08 0.72 0.84
3 A1 1339 1270 13.44 24.02 0.17 0.29
4 A1 1179 1118 0.10 1.43 0.51 0.68
5 A1 934 886 61.89 11.73 0.74 0.85
6 A2 3215 3049 0.00 108.17 0.75 0.86
7 A2 1194 1133 0.00 4.75 0.75 0.86
8 A2 1057 1002 0.00 0.20 0.75 0.86
9 B1 3231 3064 57.81 15.01 0.75 0.86
10 B1 1188 1127 2.81 15.09 0.75 0.86
11 B1 829 786 0.03 8.88 0.75 0.86
12 B2 3132 2970 39.39 9.74 0.75 0.86
13 B2 1535 1456 0.55 6.83 0.75 0.86
14 B2 1156 1096 2.16 3.48 0.75 0.86
15 B2 907 860 13.17 4.50 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12809.7 cm-1
Scaled (by 0.9483) Zero Point Vibrational Energy (zpe) 12147.4 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 mPW1PW91/6-31G*
ABC
0.86734 0.74104 0.47671

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.848
C2 0.000 0.731 -0.368
C3 0.000 -0.731 -0.368
H4 0.920 1.270 -0.590
H5 -0.920 1.270 -0.590
H6 -0.920 -1.270 -0.590
H7 0.920 -1.270 -0.590

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.41881.41882.12742.12742.12742.1274
C21.41881.46281.08871.08872.21352.2135
C31.41881.46282.21352.21351.08871.0887
H42.12741.08872.21351.83983.13582.5394
H52.12741.08872.21351.83982.53943.1358
H62.12742.21351.08873.13582.53941.8398
H72.12742.21351.08872.53943.13581.8398

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 58.970 O1 C2 H4 115.445
O1 C2 H5 115.445 O1 C3 C2 58.970
O1 C3 H6 115.445 O1 C3 H7 115.445
C2 O1 C3 62.060 C2 C3 H6 119.633
C2 C3 H7 119.633 C3 C2 H4 119.633
C3 C2 H5 119.633 H4 C2 H5 115.332
H6 C3 H7 115.332
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.427      
2 C -0.145      
3 C -0.145      
4 H 0.179      
5 H 0.179      
6 H 0.179      
7 H 0.179      


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 -1.961 1.961
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.059 0.000 0.000
y 0.000 -16.165 0.000
z 0.000 0.000 -20.280
Traceless
 xyz
x 1.163 0.000 0.000
y 0.000 2.505 0.000
z 0.000 0.000 -3.668
Polar
3z2-r2-7.337
x2-y2-0.895
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.251 0.000 0.000
y 0.000 4.156 0.000
z 0.000 0.000 2.646


<r2> (average value of r2) Å2
<r2> 36.160
(<r2>)1/2 6.013