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: TPSSh/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 TPSSh/6-31G
 hartrees
Energy at 0K-77.892118
Energy at 298.15K-77.893652
HF Energy-77.892118
Nuclear repulsion energy28.250663
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 TPSSh/6-31G
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' 3270 3146 3.61      
2 A' 3188 3067 12.55      
3 A' 3081 2965 8.69      
4 A' 1652 1589 2.11      
5 A' 1448 1393 5.76      
6 A' 1098 1056 9.09      
7 A' 747 719 24.36      
8 A" 957 921 93.75      
9 A" 851 819 13.13      

Unscaled Zero Point Vibrational Energy (zpe) 8146.1 cm-1
Scaled (by 0.9621) Zero Point Vibrational Energy (zpe) 7837.3 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 TPSSh/6-31G
ABC
7.88465 1.06855 0.94102

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.048 0.728 0.000
C2 0.048 -0.592 0.000
H3 -0.676 1.532 0.000
H4 -0.875 -1.179 0.000
H5 0.970 -1.170 0.000

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5
C11.32011.08232.11902.1105
C21.32012.24401.09431.0882
H31.08232.24402.71813.1644
H42.11901.09432.71811.8451
H52.11051.08823.16441.8451

picture of vinyl state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 122.451 C1 C2 H5 122.116
C2 C1 H3 137.949 H4 C2 H5 115.433
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.123      
2 C -0.375      
3 H 0.164      
4 H 0.164      
5 H 0.170      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.625 -0.252 0.000 0.674
CHELPG        
AIM        
ESP        


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 2.385 -0.242 0.000
y -0.242 4.466 0.000
z 0.000 0.000 1.146


<r2> (average value of r2) Å2
<r2> 20.368
(<r2>)1/2 4.513