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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: B3LYPultrafine/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3LYPultrafine/aug-cc-pVDZ
 hartrees
Energy at 0K-152.495040
Energy at 298.15K 
HF Energy-152.495040
Nuclear repulsion energy61.042610
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 B3LYPultrafine/aug-cc-pVDZ
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 3402 3301 3.18 89.76 0.18 0.31
2 A1 1827 1773 3.53 94.74 0.10 0.18
3 A1 1048 1017 11.57 6.64 0.60 0.75
4 A1 878 852 63.19 7.54 0.75 0.86
5 A2 603 585 0.00 5.70 0.75 0.86
6 B1 521 505 87.65 0.06 0.75 0.86
7 B2 3327 3229 55.25 17.33 0.75 0.86
8 B2 950 922 8.06 2.55 0.75 0.86
9 B2 128i 124i 2.62 16.49 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6213.7 cm-1
Scaled (by 0.9704) Zero Point Vibrational Energy (zpe) 6029.8 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 B3LYPultrafine/aug-cc-pVDZ
ABC
1.10480 0.86870 0.48631

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/aug-cc-pVDZ

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 -0.466
C3 0.000 -0.636 -0.466
H4 0.000 1.660 -0.803
H5 0.000 -1.660 -0.803

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.50671.50672.37792.3779
C21.50671.27191.07782.3203
C31.50671.27192.32031.0778
H42.37791.07782.32033.3194
H52.37792.32031.07783.3194

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 65.035 O1 C2 H4 133.185
O1 C3 C2 65.035 O1 C3 H5 133.185
C2 O1 C3 49.930 C2 C3 H5 161.781
C3 C2 H4 161.781
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYPultrafine/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.583      
2 C 0.690      
3 C 0.690      
4 H -0.399      
5 H -0.399      


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 -2.409 2.409
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.978 0.000 0.000
y 0.000 -11.917 0.000
z 0.000 0.000 -19.333
Traceless
 xyz
x -3.353 0.000 0.000
y 0.000 7.238 0.000
z 0.000 0.000 -3.886
Polar
3z2-r2-7.771
x2-y2-7.061
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.079 0.000 0.000
y 0.000 4.978 0.000
z 0.000 0.000 4.074


<r2> (average value of r2) Å2
<r2> 31.194
(<r2>)1/2 5.585