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: B2PLYP/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at B2PLYP/6-31G*
 hartrees
Energy at 0K-77.799500
Energy at 298.15K-77.801018
HF Energy-77.723585
Nuclear repulsion energy28.397918
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/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3295 3128 2.60      
2 A' 3217 3054 6.24      
3 A' 3116 2958 4.95      
4 A' 1707 1621 1.61      
5 A' 1437 1364 5.58      
6 A' 1093 1037 9.79      
7 A' 745 707 21.21      
8 A" 941 893 75.85      
9 A" 830 788 6.97      

Unscaled Zero Point Vibrational Energy (zpe) 8190.5 cm-1
Scaled (by 0.9492) Zero Point Vibrational Energy (zpe) 7774.4 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/6-31G*
ABC
7.81164 1.08570 0.95321

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.050 0.723 0.000
C2 0.050 -0.587 0.000
H3 -0.688 1.513 0.000
H4 -0.878 -1.165 0.000
H5 0.970 -1.166 0.000

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5
C11.31041.08102.10372.1017
C21.31042.22631.09271.0873
H31.08102.22632.68493.1511
H42.10371.09272.68491.8478
H52.10171.08733.15111.8478

picture of vinyl state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 121.921 C1 C2 H5 122.180
C2 C1 H3 136.951 H4 C2 H5 115.899
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.153      
2 C -0.371      
3 H 0.179      
4 H 0.170      
5 H 0.175      


Electric dipole moments


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.433 -0.254 0.000
y -0.254 4.357 0.000
z 0.000 0.000 1.268


<r2> (average value of r2) Å2
<r2> 20.229
(<r2>)1/2 4.498