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/STO-3G

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/STO-3G
 hartrees
Energy at 0K-76.789585
Energy at 298.15K-76.791105
HF Energy-76.754784
Nuclear repulsion energy28.220532
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/STO-3G
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' 3519 3519 0.82      
2 A' 3496 3496 3.39      
3 A' 3374 3374 17.38      
4 A' 1851 1851 4.30      
5 A' 1555 1555 2.17      
6 A' 1198 1198 6.64      
7 A' 812 812 7.74      
8 A" 1023 1023 32.39      
9 A" 949 949 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 8888.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8888.3 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 B2PLYP/STO-3G
ABC
7.46130 1.08175 0.94477

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.053 0.730 0.000
C2 0.053 -0.586 0.000
H3 -0.748 1.482 0.000
H4 -0.873 -1.183 0.000
H5 0.985 -1.167 0.000

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5
C11.31581.09852.12512.1136
C21.31582.21711.10151.0981
H31.09852.21712.66713.1652
H42.12511.10152.66711.8573
H52.11361.09813.16521.8573

picture of vinyl state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 122.821 C1 C2 H5 121.972
C2 C1 H3 133.151 H4 C2 H5 115.208
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.052      
2 C -0.178      
3 H 0.076      
4 H 0.077      
5 H 0.077      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.374 -0.046 0.000 0.377
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.150 -0.590 0.000
y -0.590 -10.866 0.000
z 0.000 0.000 -12.641
Traceless
 xyz
x 0.603 -0.590 0.000
y -0.590 1.030 0.000
z 0.000 0.000 -1.633
Polar
3z2-r2-3.267
x2-y2-0.284
xy-0.590
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.272 -0.270 0.000
y -0.270 2.521 0.000
z 0.000 0.000 0.415


<r2> (average value of r2) Å2
<r2> 19.753
(<r2>)1/2 4.444