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: PBEPBEultrafine/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at PBEPBEultrafine/6-311G*
 hartrees
Energy at 0K-153.636743
Energy at 298.15K 
HF Energy-153.636743
Nuclear repulsion energy74.811297
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 PBEPBEultrafine/6-311G*
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 3011 2979 16.99 228.70 0.10 0.18
2 A1 1504 1489 3.22 2.23 0.75 0.86
3 A1 1278 1264 13.00 24.14 0.16 0.28
4 A1 1102 1091 0.06 1.06 0.73 0.84
5 A1 884 875 64.02 11.01 0.74 0.85
6 A2 3082 3050 0.00 130.32 0.75 0.86
7 A2 1145 1134 0.00 3.51 0.75 0.86
8 A2 1010 1000 0.00 0.10 0.75 0.86
9 B1 3098 3066 79.81 21.75 0.75 0.86
10 B1 1138 1126 2.42 13.15 0.75 0.86
11 B1 797 788 0.03 8.58 0.75 0.86
12 B2 3003 2972 54.03 12.71 0.75 0.86
13 B2 1466 1451 0.11 7.27 0.75 0.86
14 B2 1085 1074 3.89 3.14 0.75 0.86
15 B2 829 820 14.92 2.39 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12215.9 cm-1
Scaled (by 0.9896) Zero Point Vibrational Energy (zpe) 12088.8 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 PBEPBEultrafine/6-311G*
ABC
0.84565 0.73162 0.46778

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/6-311G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.859
C2 0.000 0.736 -0.374
C3 0.000 -0.736 -0.374
H4 0.928 1.277 -0.597
H5 -0.928 1.277 -0.597
H6 -0.928 -1.277 -0.597
H7 0.928 -1.277 -0.597

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.43581.43582.14732.14732.14732.1473
C21.43581.47171.09701.09702.22782.2278
C31.43581.47172.22782.22781.09701.0970
H42.14731.09702.22781.85533.15732.5547
H52.14731.09702.22781.85532.55473.1573
H62.14732.22781.09703.15732.55471.8553
H72.14732.22781.09702.55473.15731.8553

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 59.169 O1 C2 H4 115.298
O1 C2 H5 115.298 O1 C3 C2 59.169
O1 C3 H6 115.298 O1 C3 H7 115.298
C2 O1 C3 61.662 C2 C3 H6 119.578
C2 C3 H7 119.578 C3 C2 H4 119.578
C3 C2 H5 119.578 H4 C2 H5 115.483
H6 C3 H7 115.483
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.255      
2 C -0.297      
3 C -0.297      
4 H 0.212      
5 H 0.212      
6 H 0.212      
7 H 0.212      


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 -1.835 1.835
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.359 0.000 0.000
y 0.000 -16.644 0.000
z 0.000 0.000 -20.659
Traceless
 xyz
x 1.292 0.000 0.000
y 0.000 2.365 0.000
z 0.000 0.000 -3.657
Polar
3z2-r2-7.314
x2-y2-0.715
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.504 0.000 0.000
y 0.000 4.490 0.000
z 0.000 0.000 3.004


<r2> (average value of r2) Å2
<r2> 36.851
(<r2>)1/2 6.070