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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: BLYP/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 BLYP/6-31+G**
 hartrees
Energy at 0K-152.448412
Energy at 298.15K 
HF Energy-152.448412
Nuclear repulsion energy60.355481
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 BLYP/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 3324 3307 2.31 99.22 0.22 0.36
2 A1 1767 1758 3.07 85.04 0.11 0.20
3 A1 1011 1006 6.78 7.06 0.72 0.84
4 A1 836 831 59.80 9.50 0.75 0.86
5 A2 548 545 0.00 7.76 0.75 0.86
6 B1 506 503 93.33 0.04 0.75 0.86
7 B2 3256 3239 43.72 20.23 0.75 0.86
8 B2 903 899 7.98 2.47 0.75 0.86
9 B2 351i 349i 3.75 23.98 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5900.0 cm-1
Scaled (by 0.9947) Zero Point Vibrational Energy (zpe) 5868.7 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 BLYP/6-31+G**
ABC
1.09139 0.83991 0.47464

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.915
C2 0.000 0.640 -0.475
C3 0.000 -0.640 -0.475
H4 0.000 1.667 -0.809
H5 0.000 -1.667 -0.809

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.53061.53062.39882.3988
C21.53061.28081.08002.3318
C31.53061.28082.33181.0800
H42.39881.08002.33183.3347
H52.39882.33181.08003.3347

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 65.267 O1 C2 H4 132.767
O1 C3 C2 65.267 O1 C3 H5 132.767
C2 O1 C3 49.466 C2 C3 H5 161.966
C3 C2 H4 161.966
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.361      
2 C 0.016      
3 C 0.016      
4 H 0.165      
5 H 0.165      


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 -2.643 2.643
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.254 0.000 0.000
y 0.000 -12.040 0.000
z 0.000 0.000 -19.391
Traceless
 xyz
x -3.538 0.000 0.000
y 0.000 7.282 0.000
z 0.000 0.000 -3.744
Polar
3z2-r2-7.488
x2-y2-7.214
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.783 0.000 0.000
y 0.000 4.884 0.000
z 0.000 0.000 3.783


<r2> (average value of r2) Å2
<r2> 31.752
(<r2>)1/2 5.635