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

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/3-21G
 hartrees
Energy at 0K-152.742429
Energy at 298.15K 
HF Energy-152.742429
Nuclear repulsion energy72.627617
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/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 3046 3019 5.97 179.12 0.09 0.17
2 A1 1523 1509 0.10 7.76 0.71 0.83
3 A1 1197 1186 5.47 18.16 0.13 0.24
4 A1 1086 1076 9.76 3.96 0.54 0.70
5 A1 823 815 24.37 10.32 0.75 0.86
6 A2 3119 3091 0.00 102.99 0.75 0.86
7 A2 1155 1144 0.00 6.98 0.75 0.86
8 A2 956 948 0.00 0.00 0.75 0.86
9 B1 3140 3111 53.00 16.44 0.75 0.86
10 B1 1074 1064 0.06 20.16 0.75 0.86
11 B1 812 805 0.19 13.59 0.75 0.86
12 B2 3036 3008 27.19 9.59 0.75 0.86
13 B2 1503 1490 0.03 7.25 0.75 0.86
14 B2 1075 1065 18.12 3.90 0.75 0.86
15 B2 761 754 8.83 5.11 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12152.8 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 12042.2 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/3-21G
ABC
0.76337 0.71724 0.43644

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.913
C2 0.000 0.748 -0.397
C3 0.000 -0.748 -0.397
H4 0.929 1.278 -0.637
H5 -0.929 1.278 -0.637
H6 -0.929 -1.278 -0.637
H7 0.929 -1.278 -0.637

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.50851.50852.21302.21302.21302.2130
C21.50851.49691.09591.09592.24182.2418
C31.50851.49692.24182.24181.09591.0959
H42.21301.09592.24181.85843.15942.5550
H52.21301.09592.24181.85842.55503.1594
H62.21302.24181.09593.15942.55501.8584
H72.21302.24181.09592.55503.15941.8584

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 60.255 O1 C2 H4 115.452
O1 C2 H5 115.452 O1 C3 C2 60.255
O1 C3 H6 115.452 O1 C3 H7 115.452
C2 O1 C3 59.489 C2 C3 H6 118.868
C2 C3 H7 118.868 C3 C2 H4 118.868
C3 C2 H5 118.868 H4 C2 H5 115.965
H6 C3 H7 115.965
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.384      
2 C -0.244      
3 C -0.244      
4 H 0.218      
5 H 0.218      
6 H 0.218      
7 H 0.218      


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 -2.126 2.126
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.259 0.000 0.000
y 0.000 -16.481 0.000
z 0.000 0.000 -20.553
Traceless
 xyz
x 1.258 0.000 0.000
y 0.000 2.425 0.000
z 0.000 0.000 -3.683
Polar
3z2-r2-7.366
x2-y2-0.778
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.047 0.000 0.000
y 0.000 4.116 0.000
z 0.000 0.000 2.575


<r2> (average value of r2) Å2
<r2> 38.187
(<r2>)1/2 6.180