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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: B1B95/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 B1B95/daug-cc-pVTZ
 hartrees
Energy at 0K-152.475253
Energy at 298.15K 
HF Energy-152.475253
Nuclear repulsion energy62.009258
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 B1B95/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 3418 3418 2.95 85.07 0.19 0.31
2 A1 1849 1849 3.28 95.69 0.08 0.15
3 A1 1101 1101 19.23 5.99 0.71 0.83
4 A1 913 913 59.83 5.34 0.72 0.84
5 A2 691 691 0.00 4.95 0.75 0.86
6 B1 568 568 84.62 0.02 0.75 0.86
7 B2 3343 3343 52.55 15.33 0.75 0.86
8 B2 982 982 6.60 2.29 0.75 0.86
9 B2 259 259 2.97 15.74 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6561.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6561.6 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 B1B95/daug-cc-pVTZ
ABC
1.12792 0.90644 0.50256

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/daug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.881
C2 0.000 0.629 -0.456
C3 0.000 -0.629 -0.456
H4 0.000 1.644 -0.786
H5 0.000 -1.644 -0.786

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.47781.47782.34142.3414
C21.47781.25801.06762.2972
C31.47781.25802.29721.0676
H42.34141.06762.29723.2890
H52.34142.29721.06763.2890

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.810 O1 C2 H4 133.157
O1 C3 C2 64.810 O1 C3 H5 133.157
C2 O1 C3 50.379 C2 C3 H5 162.032
C3 C2 H4 162.032
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.766      
2 C -0.732      
3 C -0.732      
4 H 1.115      
5 H 1.115      


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 -2.313 2.313
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.682 0.000 0.000
y 0.000 -11.717 0.000
z 0.000 0.000 -19.033
Traceless
 xyz
x -3.307 0.000 0.000
y 0.000 7.140 0.000
z 0.000 0.000 -3.834
Polar
3z2-r2-7.667
x2-y2-6.965
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.183 0.000 0.000
y 0.000 4.888 0.000
z 0.000 0.000 4.034


<r2> (average value of r2) Å2
<r2> 30.390
(<r2>)1/2 5.513