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: ROHF/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 ROHF/6-311G**
 hartrees
Energy at 0K-77.403164
Energy at 298.15K-77.404790
HF Energy-77.403164
Nuclear repulsion energy28.643783
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 ROHF/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' 3378 3083 1.17      
2 A' 3337 3045 8.76      
3 A' 3250 2966 5.70      
4 A' 1779 1624 2.53      
5 A' 1505 1374 7.96      
6 A' 1198 1094 8.95      
7 A' 826 754 13.63      
8 A" 1052 960 75.14      
9 A" 964 880 28.49      

Unscaled Zero Point Vibrational Energy (zpe) 8644.6 cm-1
Scaled (by 0.9126) Zero Point Vibrational Energy (zpe) 7889.1 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 ROHF/6-311G**
ABC
7.77496 1.10958 0.97101

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.051 0.719 0.000
C2 0.051 -0.583 0.000
H3 -0.707 1.478 0.000
H4 -0.872 -1.145 0.000
H5 0.968 -1.148 0.000

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5
C11.30151.07262.07912.0794
C21.30152.19571.08011.0771
H31.07262.19572.62773.1142
H42.07911.08012.62771.8397
H52.07941.07713.11421.8397

picture of vinyl state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 121.334 C1 C2 H5 121.623
C2 C1 H3 135.065 H4 C2 H5 117.043
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at ROHF/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.147      
2 C -0.236      
3 H 0.135      
4 H 0.122      
5 H 0.126      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.603 -0.232 0.000 0.646
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -12.205 -1.110 0.001
y -1.110 -11.359 -0.001
z 0.001 -0.001 -14.877
Traceless
 xyz
x 0.912 -1.110 0.001
y -1.110 2.182 -0.001
z 0.001 -0.001 -3.094
Polar
3z2-r2-6.189
x2-y2-0.847
xy-1.110
xz0.001
yz-0.001


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


<r2> (average value of r2) Å2
<r2> 20.179
(<r2>)1/2 4.492