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

using model chemistry: MP2=FULL/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 MP2=FULL/3-21G*
 hartrees
Energy at 0K-152.310096
Energy at 298.15K 
HF Energy-151.997355
Nuclear repulsion energy72.535891
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=FULL/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 3184 3018 2.37 153.43 0.11 0.19
2 A1 1605 1522 0.00 8.20 0.72 0.84
3 A1 1227 1163 6.81 8.16 0.07 0.14
4 A1 1141 1082 6.08 11.47 0.25 0.40
5 A1 811 769 17.61 11.22 0.73 0.85
6 A2 3264 3095 0.00 85.17 0.75 0.86
7 A2 1224 1161 0.00 6.35 0.75 0.86
8 A2 1009 956 0.00 0.00 0.75 0.86
9 B1 3283 3113 35.99 11.50 0.75 0.86
10 B1 1122 1064 0.88 18.34 0.75 0.86
11 B1 861 817 0.05 11.42 0.75 0.86
12 B2 3173 3008 17.41 6.14 0.75 0.86
13 B2 1591 1509 0.17 5.65 0.75 0.86
14 B2 1149 1089 13.00 2.51 0.75 0.86
15 B2 759 720 2.34 7.03 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12702.3 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 12041.7 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=FULL/3-21G*
ABC
0.75242 0.72298 0.43331

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.922
C2 0.000 0.746 -0.404
C3 0.000 -0.746 -0.404
H4 0.920 1.273 -0.633
H5 -0.920 1.273 -0.633
H6 -0.920 -1.273 -0.633
H7 0.920 -1.273 -0.633

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.52191.52192.21032.21032.21032.2103
C21.52191.49301.08411.08412.23092.2309
C31.52191.49302.23092.23091.08411.0841
H42.21031.08412.23091.83903.14102.5463
H52.21031.08412.23091.83902.54633.1410
H62.21032.23091.08413.14102.54631.8390
H72.21032.23091.08412.54633.14101.8390

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 60.627 O1 C2 H4 114.983
O1 C2 H5 114.983 O1 C3 C2 60.627
O1 C3 H6 114.983 O1 C3 H7 114.983
C2 O1 C3 58.745 C2 C3 H6 119.063
C2 C3 H7 119.063 C3 C2 H4 119.063
C3 C2 H5 119.063 H4 C2 H5 116.028
H6 C3 H7 116.028
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability