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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: QCISD(T)/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 QCISD(T)/daug-cc-pVTZ
 hartrees
Energy at 0K-152.248651
Energy at 298.15K 
HF Energy-151.645581
Nuclear repulsion energy61.121679
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 QCISD(T)/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 3392 3392        
2 A1 1755 1755        
3 A1 1061 1061        
4 A1 870 870        
5 A2 581 581        
6 B1 503 503        
7 B2 3322 3322        
8 B2 957 957        
9 B2 145 145        

Unscaled Zero Point Vibrational Energy (zpe) 6292.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6292.9 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 QCISD(T)/daug-cc-pVTZ
ABC
1.10255 0.87461 0.48772

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/daug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.897
C2 0.000 0.638 -0.465
C3 0.000 -0.638 -0.465
H4 0.000 1.656 -0.796
H5 0.000 -1.656 -0.796

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.50391.50392.36812.3681
C21.50391.27551.07082.3176
C31.50391.27552.31761.0708
H42.36811.07082.31763.3123
H52.36812.31761.07083.3123

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.909 O1 C2 H4 133.082
O1 C3 C2 64.909 O1 C3 H5 133.082
C2 O1 C3 50.183 C2 C3 H5 162.009
C3 C2 H4 162.009
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability