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

using model chemistry: MP2/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/STO-3G
 hartrees
Energy at 0K-151.081121
Energy at 298.15K 
HF Energy-150.924460
Nuclear repulsion energy73.225091
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 MP2/STO-3G
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 3411 2974 0.03 63.70 0.11 0.19
2 A1 1697 1479 0.17 13.92 0.72 0.84
3 A1 1391 1213 0.48 12.99 0.29 0.46
4 A1 1275 1111 2.74 2.86 0.25 0.40
5 A1 997 870 3.90 7.23 0.75 0.85
6 A2 3553 3098 0.00 46.77 0.75 0.86
7 A2 1260 1099 0.00 6.58 0.75 0.86
8 A2 1091 951 0.00 0.02 0.75 0.86
9 B1 3561 3104 4.85 7.25 0.75 0.86
10 B1 1203 1049 8.35 11.12 0.75 0.86
11 B1 882 769 0.18 3.64 0.75 0.86
12 B2 3400 2964 1.39 4.18 0.75 0.86
13 B2 1657 1445 1.55 5.16 0.75 0.86
14 B2 1230 1072 0.11 0.41 0.75 0.86
15 B2 1069 932 0.02 5.62 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13837.3 cm-1
Scaled (by 0.8719) Zero Point Vibrational Energy (zpe) 12064.7 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 MP2/STO-3G
ABC
0.80320 0.70652 0.44512

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/STO-3G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.886
C2 0.000 0.753 -0.380
C3 0.000 -0.753 -0.380
H4 0.930 1.295 -0.631
H5 -0.930 1.295 -0.631
H6 -0.930 -1.295 -0.631
H7 0.930 -1.295 -0.631

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.47371.47372.20102.20102.20102.2010
C21.47371.50611.10541.10542.26342.2634
C31.47371.50612.26342.26341.10541.1054
H42.20101.10542.26341.86043.18912.5902
H52.20101.10542.26341.86042.59023.1891
H62.20102.26341.10543.18912.59021.8604
H72.20102.26341.10542.59023.18911.8604

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 59.269 O1 C2 H4 116.446
O1 C2 H5 116.446 O1 C3 C2 59.269
O1 C3 H6 116.446 O1 C3 H7 116.446
C2 O1 C3 61.462 C2 C3 H6 119.367
C2 C3 H7 119.367 C3 C2 H4 119.367
C3 C2 H5 119.367 H4 C2 H5 114.604
H6 C3 H7 114.604
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability