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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: TPSSh/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at TPSSh/STO-3G
 hartrees
Energy at 0K-150.512857
Energy at 298.15K 
HF Energy-150.512857
Nuclear repulsion energy59.670857
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 TPSSh/STO-3G
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 3573 3573 13.98 55.94 0.22 0.36
2 A1 1880 1880 0.02 23.56 0.20 0.34
3 A1 1243 1243 0.11 2.73 0.28 0.43
4 A1 944 944 1.74 8.10 0.70 0.82
5 A2 719 719 0.00 0.16 0.75 0.86
6 B1 586 586 47.96 0.83 0.75 0.86
7 B2 3477 3477 123.65 19.23 0.75 0.86
8 B2 982 982 11.81 3.34 0.75 0.86
9 B2 482 482 3.43 9.97 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6943.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6943.0 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 TPSSh/STO-3G
ABC
1.08273 0.80995 0.46334

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/STO-3G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.933
C2 0.000 0.648 -0.471
C3 0.000 -0.648 -0.471
H4 0.000 1.651 -0.907
H5 0.000 -1.651 -0.907

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.54571.54572.47192.4719
C21.54571.29581.09392.3400
C31.54571.29582.34001.0939
H42.47191.09392.34003.3020
H52.47192.34001.09393.3020

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 65.218 O1 C2 H4 138.292
O1 C3 C2 65.218 O1 C3 H5 138.292
C2 O1 C3 49.564 C2 C3 H5 156.490
C3 C2 H4 156.490
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.141      
2 C -0.045      
3 C -0.045      
4 H 0.115      
5 H 0.115      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -1.494 1.494
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.453 0.000 0.000
y 0.000 2.818 0.000
z 0.000 0.000 1.592


<r2> (average value of r2) Å2
<r2> 31.052
(<r2>)1/2 5.572