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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: B2PLYP=FULLultrafine/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 B2PLYP=FULLultrafine/3-21G
 hartrees
Energy at 0K-151.423489
Energy at 298.15K 
HF Energy-151.314076
Nuclear repulsion energy59.050936
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 B2PLYP=FULLultrafine/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 3437 3437 4.19 83.92 0.18 0.30
2 A1 1765 1765 1.41 34.39 0.24 0.39
3 A1 1012 1012 4.23 2.39 0.44 0.61
4 A1 828 828 14.52 9.22 0.48 0.64
5 A2 637 637 0.00 2.34 0.75 0.86
6 B1 582 582 111.33 0.96 0.75 0.86
7 B2 3365 3365 35.87 20.08 0.75 0.86
8 B2 935 935 10.94 2.94 0.75 0.86
9 B2 114i 114i 3.62 12.78 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6223.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6223.0 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 B2PLYP=FULLultrafine/3-21G
ABC
1.11013 0.75539 0.44952

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.965
C2 0.000 0.638 -0.499
C3 0.000 -0.638 -0.499
H4 0.000 1.639 -0.868
H5 0.000 -1.639 -0.868

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.59691.59692.45912.4591
C21.59691.27601.06712.3069
C31.59691.27602.30691.0671
H42.45911.06712.30693.2784
H52.45912.30691.06713.2784

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 66.450 O1 C2 H4 133.791
O1 C3 C2 66.450 O1 C3 H5 133.791
C2 O1 C3 47.099 C2 C3 H5 159.758
C3 C2 H4 159.758
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability