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: HSEh1PBE/daug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HSEh1PBE/daug-cc-pVTZ
 hartrees
Energy at 0K-153.685856
Energy at 298.15K 
HF Energy-153.685856
Nuclear repulsion energy75.681837
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 HSEh1PBE/daug-cc-pVTZ
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 3109 3109 16.41 247.83 0.06 0.11
2 A1 1541 1541 3.10 2.54 0.23 0.38
3 A1 1324 1324 16.67 30.43 0.11 0.21
4 A1 1157 1157 0.01 2.47 0.24 0.39
5 A1 925 925 72.22 7.65 0.70 0.82
6 A2 3186 3186 0.00 109.15 0.75 0.86
7 A2 1174 1174 0.00 0.73 0.75 0.86
8 A2 1054 1054 0.00 0.03 0.75 0.86
9 B1 3201 3201 37.52 21.66 0.75 0.86
10 B1 1177 1177 4.14 3.34 0.75 0.86
11 B1 818 818 0.24 2.76 0.75 0.86
12 B2 3102 3102 34.49 9.92 0.75 0.86
13 B2 1499 1499 0.35 3.41 0.75 0.86
14 B2 1166 1166 0.29 0.24 0.75 0.86
15 B2 893 893 11.22 3.20 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12664.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12664.0 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 HSEh1PBE/daug-cc-pVTZ
ABC
0.86837 0.74617 0.47904

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/daug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.847
C2 0.000 0.729 -0.369
C3 0.000 -0.729 -0.369
H4 0.919 1.263 -0.588
H5 -0.919 1.263 -0.588
H6 -0.919 -1.263 -0.588
H7 0.919 -1.263 -0.588

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.41751.41752.12102.12102.12102.1210
C21.41751.45781.08561.08562.20492.2049
C31.41751.45782.20492.20491.08561.0856
H42.12101.08562.20491.83873.12472.5265
H52.12101.08562.20491.83872.52653.1247
H62.12102.20491.08563.12472.52651.8387
H72.12102.20491.08562.52653.12471.8387

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 59.054 O1 C2 H4 115.210
O1 C2 H5 115.210 O1 C3 C2 59.054
O1 C3 H6 115.210 O1 C3 H7 115.210
C2 O1 C3 61.893 C2 C3 H6 119.484
C2 C3 H7 119.484 C3 C2 H4 119.484
C3 C2 H5 119.484 H4 C2 H5 115.740
H6 C3 H7 115.740
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.824      
2 C -0.558      
3 C -0.558      
4 H 0.485      
5 H 0.485      
6 H 0.485      
7 H 0.485      


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 -1.837 1.837
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.368 0.000 0.000
y 0.000 -16.489 0.000
z 0.000 0.000 -20.885
Traceless
 xyz
x 1.319 0.000 0.000
y 0.000 2.638 0.000
z 0.000 0.000 -3.957
Polar
3z2-r2-7.913
x2-y2-0.879
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.950 0.000 0.000
y 0.000 4.816 0.000
z 0.000 0.000 3.930


<r2> (average value of r2) Å2
<r2> 36.288
(<r2>)1/2 6.024