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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: MP2=FULL/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 MP2=FULL/cc-pVTZ
 hartrees
Energy at 0K-152.237923
Energy at 298.15K 
HF Energy-151.642786
Nuclear repulsion energy61.430512
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 MP2=FULL/cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3455 3280 2.89 96.54 0.20 0.33
2 A1 1785 1695 2.63 38.41 0.14 0.24
3 A1 1098 1042 5.09 5.90 0.29 0.46
4 A1 894 849 51.14 6.18 0.52 0.68
5 A2 614 583 0.00 1.95 0.75 0.86
6 B1 517 490 82.53 0.28 0.75 0.86
7 B2 3370 3199 52.84 16.34 0.75 0.86
8 B2 971 922 7.13 1.78 0.75 0.86
9 B2 132 126 2.33 14.19 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6418.2 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 6093.4 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 MP2=FULL/cc-pVTZ
ABC
1.11661 0.88109 0.49248

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.893
C2 0.000 0.634 -0.463
C3 0.000 -0.634 -0.463
H4 0.000 1.644 -0.796
H5 0.000 -1.644 -0.796

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.49741.49742.35722.3572
C21.49741.26801.06362.3025
C31.49741.26802.30251.0636
H42.35721.06362.30253.2887
H52.35722.30251.06363.2887

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.951 O1 C2 H4 133.262
O1 C3 C2 64.951 O1 C3 H5 133.262
C2 O1 C3 50.099 C2 C3 H5 161.787
C3 C2 H4 161.787
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability