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

using model chemistry: CBS-Q

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CBS-Q
 hartrees
Energy at 0K-153.537089
Energy at 298.15K-153.533005
HF Energy-152.864875
Nuclear repulsion energy76.332642
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 CBS-Q
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 3288 3288 11.19 188.29 0.11 0.20
2 A1 1691 1691 5.35 2.70 0.40 0.57
3 A1 1422 1422 18.00 27.26 0.17 0.30
4 A1 1293 1293 4.62 3.12 0.30 0.47
5 A1 985 985 85.31 12.78 0.73 0.84
6 A2 3362 3362 0.00 107.90 0.75 0.86
7 A2 1280 1280 0.00 4.01 0.75 0.86
8 A2 1152 1152 0.00 0.14 0.75 0.86
9 B1 3379 3379 65.22 11.46 0.75 0.86
10 B1 1289 1289 7.78 13.40 0.75 0.86
11 B1 878 878 0.01 6.44 0.75 0.86
12 B2 3274 3274 50.03 7.50 0.75 0.86
13 B2 1636 1636 0.84 5.15 0.75 0.86
14 B2 1279 1279 0.04 2.29 0.75 0.86
15 B2 971 971 11.69 8.43 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13589.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 13589.5 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 CBS-Q
ABC
0.85054 0.73579 0.47030

See section I.F.4 to change rotational constant units
Geometric Data calculated at CBS-Q

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.832
C2 0.000 0.727 -0.364
C3 0.000 -0.727 -0.364
H4 0.913 1.264 -0.574
H5 -0.913 1.264 -0.574
H6 -0.913 -1.264 -0.574
H7 0.913 -1.264 -0.574

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.39961.39962.09972.09972.09972.0997
C21.39961.45441.07971.07972.20082.2008
C31.39961.45442.20082.20081.07971.0797
H42.09971.07972.20081.82523.11882.5289
H52.09971.07972.20081.82522.52893.1188
H62.09972.20081.07973.11882.52891.8252
H72.09972.20081.07972.52893.11881.8252

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 58.695 O1 C2 H4 115.146
O1 C2 H5 115.146 O1 C3 C2 58.695
O1 C3 H6 115.146 O1 C3 H7 115.146
C2 O1 C3 62.609 C2 C3 H6 119.841
C2 C3 H7 119.841 C3 C2 H4 119.841
C3 C2 H5 119.841 H4 C2 H5 115.403
H6 C3 H7 115.403
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability