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: BLYP/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at BLYP/cc-pVDZ
 hartrees
Energy at 0K-77.863439
Energy at 298.15K-77.864876
HF Energy-77.863439
Nuclear repulsion energy28.080547
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 BLYP/cc-pVDZ
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' 3151 3156 1.85      
2 A' 3057 3062 5.43      
3 A' 2947 2951 6.58      
4 A' 1607 1610 1.31      
5 A' 1325 1327 7.50      
6 A' 1007 1009 10.45      
7 A' 677 679 24.69      
8 A" 870 871 61.03      
9 A" 757 758 8.27      

Unscaled Zero Point Vibrational Energy (zpe) 7699.3 cm-1
Scaled (by 1.0016) Zero Point Vibrational Energy (zpe) 7711.7 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 BLYP/cc-pVDZ
ABC
7.65510 1.06266 0.93312

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.049 0.728 0.000
C2 0.049 -0.592 0.000
H3 -0.681 1.547 0.000
H4 -0.894 -1.180 0.000
H5 0.982 -1.184 0.000

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5
C11.32021.09792.12862.1274
C21.32022.26091.11181.1047
H31.09792.26092.73543.1981
H42.12861.11182.73541.8767
H52.12741.10473.19811.8767

picture of vinyl state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 121.908 C1 C2 H5 122.382
C2 C1 H3 138.260 H4 C2 H5 115.710
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.094      
2 C 0.004      
3 H 0.028      
4 H 0.030      
5 H 0.032      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.554 -0.282 0.000 0.621
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -12.322 -1.074 0.000
y -1.074 -11.330 0.000
z 0.000 0.000 -14.375
Traceless
 xyz
x 0.530 -1.074 0.000
y -1.074 2.019 0.000
z 0.000 0.000 -2.549
Polar
3z2-r2-5.098
x2-y2-0.992
xy-1.074
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.781 -0.246 -0.001
y -0.246 4.804 -0.000
z -0.001 -0.000 1.581


<r2> (average value of r2) Å2
<r2> 20.648
(<r2>)1/2 4.544