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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: PBEPBEultrafine/TZVP

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/TZVP
 hartrees
Energy at 0K-152.354321
Energy at 298.15K 
HF Energy-152.354321
Nuclear repulsion energy60.949124
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/TZVP
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 3325 3287 2.20 94.01 0.19 0.32
2 A1 1783 1763 2.20 67.45 0.15 0.26
3 A1 1039 1028 6.32 6.06 0.50 0.66
4 A1 857 847 55.58 8.01 0.62 0.77
5 A2 560 554 0.00 2.84 0.75 0.86
6 B1 503 497 92.79 0.49 0.75 0.86
7 B2 3254 3217 49.03 18.35 0.75 0.86
8 B2 924 913 7.29 2.44 0.75 0.86
9 B2 333i 329i 6.27 19.11 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5955.9 cm-1
Scaled (by 0.9886) Zero Point Vibrational Energy (zpe) 5888.0 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 PBEPBEultrafine/TZVP
ABC
1.10352 0.86437 0.48471

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.902
C2 0.000 0.636 -0.467
C3 0.000 -0.636 -0.467
H4 0.000 1.661 -0.805
H5 0.000 -1.661 -0.805

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.51001.51002.38182.3818
C21.51001.27261.07882.3218
C31.51001.27262.32181.0788
H42.38181.07882.32183.3217
H52.38182.32181.07883.3217

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 65.078 O1 C2 H4 133.173
O1 C3 C2 65.078 O1 C3 H5 133.173
C2 O1 C3 49.844 C2 C3 H5 161.749
C3 C2 H4 161.749
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.312      
2 C -0.009      
3 C -0.009      
4 H 0.165      
5 H 0.165      


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 -2.490 2.490
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.781 0.000 0.000
y 0.000 -11.823 0.000
z 0.000 0.000 -18.952
Traceless
 xyz
x -3.394 0.000 0.000
y 0.000 7.044 0.000
z 0.000 0.000 -3.650
Polar
3z2-r2-7.301
x2-y2-6.959
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.292 0.000 0.000
y 0.000 4.733 0.000
z 0.000 0.000 3.397


<r2> (average value of r2) Å2
<r2> 31.119
(<r2>)1/2 5.578