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/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-77.414941
Energy at 298.15K-77.416568
HF Energy-77.414941
Nuclear repulsion energy28.705742
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/Def2TZVPP
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' 3381 3381 0.68      
2 A' 3337 3337 6.06      
3 A' 3252 3252 4.98      
4 A' 1775 1775 2.83      
5 A' 1509 1509 7.37      
6 A' 1201 1201 7.87      
7 A' 827 827 12.52      
8 A" 1057 1057 72.16      
9 A" 966 966 31.27      

Unscaled Zero Point Vibrational Energy (zpe) 8652.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8652.5 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 ROHF/Def2TZVPP
ABC
7.81428 1.11419 0.97515

See section I.F.4 to change rotational constant units
Geometric Data calculated at ROHF/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.051 0.717 0.000
C2 0.051 -0.582 0.000
H3 -0.704 1.476 0.000
H4 -0.870 -1.141 0.000
H5 0.966 -1.146 0.000

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5
C11.29871.07022.07392.0752
C21.29872.19171.07771.0747
H31.07022.19172.62243.1080
H42.07391.07772.62241.8361
H52.07521.07473.10801.8361

picture of vinyl state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 121.265 C1 C2 H5 121.648
C2 C1 H3 135.178 H4 C2 H5 117.088
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at ROHF/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.124      
2 C -0.129      
3 H 0.101      
4 H 0.074      
5 H 0.078      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.605 -0.255 0.000 0.656
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -12.328 -1.132 0.001
y -1.132 -11.400 -0.001
z 0.001 -0.001 -15.068
Traceless
 xyz
x 0.907 -1.132 0.001
y -1.132 2.298 -0.001
z 0.001 -0.001 -3.204
Polar
3z2-r2-6.409
x2-y2-0.927
xy-1.132
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> 20.201
(<r2>)1/2 4.495