return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C2H3 (vinyl)

using model chemistry: mPW1PW91/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at mPW1PW91/6-311G*
 hartrees
Energy at 0K-77.893992
Energy at 298.15K-77.895500
HF Energy-77.893992
Nuclear repulsion energy28.477209
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 mPW1PW91/6-311G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3265 3116 1.85      
2 A' 3179 3034 6.85      
3 A' 3080 2940 7.39      
4 A' 1671 1595 2.02      
5 A' 1405 1341 8.51      
6 A' 1069 1020 9.30      
7 A' 728 695 24.19      
8 A" 922 880 90.97      
9 A" 831 793 11.47      

Unscaled Zero Point Vibrational Energy (zpe) 8074.7 cm-1
Scaled (by 0.9544) Zero Point Vibrational Energy (zpe) 7706.5 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 mPW1PW91/6-311G*
ABC
7.83974 1.09309 0.95934

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.049 0.720 0.000
C2 0.049 -0.585 0.000
H3 -0.682 1.515 0.000
H4 -0.878 -1.162 0.000
H5 0.970 -1.163 0.000

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5
C11.30441.08052.09792.0960
C21.30442.22341.09261.0873
H31.08052.22342.68403.1467
H42.09791.09262.68401.8482
H52.09601.08733.14671.8482

picture of vinyl state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 121.888 C1 C2 H5 122.149
C2 C1 H3 137.395 H4 C2 H5 115.963
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.225      
2 C -0.477      
3 H 0.236      
4 H 0.229      
5 H 0.237      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.641 -0.286 0.000 0.701
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -12.117 -1.204 0.000
y -1.204 -11.096 0.000
z 0.000 0.000 -14.727
Traceless
 xyz
x 0.794 -1.204 0.000
y -1.204 2.326 0.000
z 0.000 0.000 -3.120
Polar
3z2-r2-6.240
x2-y2-1.021
xy-1.204
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.602 -0.179 0.001
y -0.179 4.662 -0.001
z 0.001 -0.001 1.712


<r2> (average value of r2) Å2
<r2> 20.263
(<r2>)1/2 4.501