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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: B2PLYP/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B2PLYP/6-31+G**
 hartrees
Energy at 0K-152.334938
Energy at 298.15K 
HF Energy-152.181748
Nuclear repulsion energy61.053702
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 B2PLYP/6-31+G**
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 3444 3281 3.08 92.05 0.21 0.35
2 A1 1813 1727 3.25 74.67 0.10 0.19
3 A1 1065 1014 7.27 7.04 0.65 0.79
4 A1 879 837 61.62 9.31 0.71 0.83
5 A2 587 559 0.00 6.64 0.75 0.86
6 B1 528 503 99.54 0.02 0.75 0.86
7 B2 3375 3215 55.15 17.94 0.75 0.86
8 B2 957 911 7.17 2.02 0.75 0.86
9 B2 207i 197i 3.23 20.04 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6220.7 cm-1
Scaled (by 0.9524) Zero Point Vibrational Energy (zpe) 5924.6 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 B2PLYP/6-31+G**
ABC
1.10595 0.86801 0.48632

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31+G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.900
C2 0.000 0.636 -0.467
C3 0.000 -0.636 -0.467
H4 0.000 1.655 -0.796
H5 0.000 -1.655 -0.796

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.50841.50842.37012.3701
C21.50841.27271.07072.3152
C31.50841.27272.31521.0707
H42.37011.07072.31523.3109
H52.37012.31521.07073.3109

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 65.046 O1 C2 H4 132.823
O1 C3 C2 65.046 O1 C3 H5 132.823
C2 O1 C3 49.908 C2 C3 H5 162.131
C3 C2 H4 162.131
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.396      
2 C 0.001      
3 C 0.001      
4 H 0.197      
5 H 0.197      


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 -2.694 2.694
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.118 0.000 0.000
y 0.000 -11.875 0.000
z 0.000 0.000 -19.331
Traceless
 xyz
x -3.515 0.000 0.000
y 0.000 7.350 0.000
z 0.000 0.000 -3.834
Polar
3z2-r2-7.668
x2-y2-7.243
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.575 0.000 0.000
y 0.000 4.638 0.000
z 0.000 0.000 3.548


<r2> (average value of r2) Å2
<r2> 31.186
(<r2>)1/2 5.584