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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: MP3=FULL/daug-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 MP3=FULL/daug-cc-pVTZ
 hartrees
Energy at 0K-152.267271
Energy at 298.15K 
HF Energy-151.648415
Nuclear repulsion energy61.986371
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 MP3=FULL/daug-cc-pVTZ
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 3439 3439 3.78      
2 A1 1843 1843 3.73      
3 A1 1125 1125 18.19      
4 A1 923 923 54.96      
5 A2 676 676 0.00      
6 B1 554 554 82.15      
7 B2 3360 3360 51.21      
8 B2 993 993 7.25      
9 B2 395 395 0.43      

Unscaled Zero Point Vibrational Energy (zpe) 6654.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6654.3 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 MP3=FULL/daug-cc-pVTZ
ABC
1.12622 0.90621 0.50215

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/daug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.881
C2 0.000 0.631 -0.455
C3 0.000 -0.631 -0.455
H4 0.000 1.640 -0.792
H5 0.000 -1.640 -0.792

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.47801.47802.34262.3426
C21.47801.26141.06382.2954
C31.47801.26142.29541.0638
H42.34261.06382.29543.2800
H52.34262.29541.06383.2800

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.739 O1 C2 H4 133.680
O1 C3 C2 64.739 O1 C3 H5 133.680
C2 O1 C3 50.523 C2 C3 H5 161.581
C3 C2 H4 161.581
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability