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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: MP3=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 MP3=FULL/cc-pVTZ
 hartrees
Energy at 0K-152.243851
Energy at 298.15K 
HF Energy-151.644218
Nuclear repulsion energy61.947207
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/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 3477 3242 3.16      
2 A1 1846 1722 2.14      
3 A1 1133 1057 10.62      
4 A1 928 865 50.94      
5 A2 650 606 0.00      
6 B1 548 511 83.62      
7 B2 3388 3159 48.58      
8 B2 1003 935 6.61      
9 B2 388 361 1.28      

Unscaled Zero Point Vibrational Energy (zpe) 6679.6 cm-1
Scaled (by 0.9326) Zero Point Vibrational Energy (zpe) 6229.4 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 MP3=FULL/cc-pVTZ
ABC
1.12760 0.90265 0.50133

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.883
C2 0.000 0.630 -0.457
C3 0.000 -0.630 -0.457
H4 0.000 1.639 -0.789
H5 0.000 -1.639 -0.789

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.48081.48082.34092.3409
C21.48081.26081.06152.2932
C31.48081.26082.29321.0615
H42.34091.06152.29323.2774
H52.34092.29321.06153.2774

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.804 O1 C2 H4 133.414
O1 C3 C2 64.804 O1 C3 H5 133.414
C2 O1 C3 50.393 C2 C3 H5 161.782
C3 C2 H4 161.782
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability