return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: MP2/daug-cc-pVDZ

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/daug-cc-pVDZ
 hartrees
Energy at 0K-153.377128
Energy at 298.15K 
HF Energy-152.887428
Nuclear repulsion energy74.396367
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/daug-cc-pVDZ
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 3153 3153 14.57 236.55 0.06 0.11
2 A1 1530 1530 1.79 3.08 0.22 0.37
3 A1 1293 1293 9.58 32.58 0.10 0.18
4 A1 1127 1127 0.70 5.29 0.10 0.18
5 A1 878 878 69.03 8.33 0.73 0.84
6 A2 3250 3250 0.00 98.13 0.75 0.86
7 A2 1165 1165 0.00 0.87 0.75 0.86
8 A2 1034 1034 0.00 0.00 0.75 0.86
9 B1 3265 3265 27.75 19.07 0.75 0.86
10 B1 1146 1146 3.56 2.94 0.75 0.86
11 B1 810 810 0.22 2.39 0.75 0.86
12 B2 3146 3146 26.62 9.19 0.75 0.86
13 B2 1495 1495 0.03 2.89 0.75 0.86
14 B2 1141 1141 0.23 0.20 0.75 0.86
15 B2 808 808 8.11 3.84 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12620.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12620.7 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/daug-cc-pVDZ
ABC
0.82705 0.73067 0.46198

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/daug-cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.870
C2 0.000 0.738 -0.382
C3 0.000 -0.738 -0.382
H4 0.929 1.272 -0.593
H5 -0.929 1.272 -0.593
H6 -0.929 -1.272 -0.593
H7 0.929 -1.272 -0.593

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.45311.45312.15042.15042.15042.1504
C21.45311.47551.09291.09292.22472.2247
C31.45311.47552.22472.22471.09291.0929
H42.15041.09292.22471.85883.15142.5449
H52.15041.09292.22471.85882.54493.1514
H62.15042.22471.09293.15142.54491.8588
H72.15042.22471.09292.54493.15141.8588

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 59.490 O1 C2 H4 114.521
O1 C2 H5 114.521 O1 C3 C2 59.490
O1 C3 H6 114.521 O1 C3 H7 114.521
C2 O1 C3 61.019 C2 C3 H6 119.293
C2 C3 H7 119.293 C3 C2 H4 119.293
C3 C2 H5 119.293 H4 C2 H5 116.513
H6 C3 H7 116.513
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability