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/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at ROHF/6-31G
 hartrees
Energy at 0K-77.355574
Energy at 298.15K-77.357223
HF Energy-77.355574
Nuclear repulsion energy28.568928
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/6-31G
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' 3435 3075 2.48      
2 A' 3386 3031 11.85      
3 A' 3298 2952 4.72      
4 A' 1802 1614 3.00      
5 A' 1552 1390 6.36      
6 A' 1233 1104 9.12      
7 A' 855 766 15.99      
8 A" 1101 986 85.11      
9 A" 995 891 39.90      

Unscaled Zero Point Vibrational Energy (zpe) 8828.9 cm-1
Scaled (by 0.8953) Zero Point Vibrational Energy (zpe) 7904.5 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/6-31G
ABC
7.90936 1.09646 0.96297

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.050 0.722 0.000
C2 0.050 -0.586 0.000
H3 -0.695 1.490 0.000
H4 -0.864 -1.156 0.000
H5 0.964 -1.151 0.000

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5
C11.30871.06972.08912.0842
C21.30872.20621.07711.0741
H31.06972.20622.65193.1188
H42.08911.07712.65191.8280
H52.08421.07413.11881.8280

picture of vinyl state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 121.934 C1 C2 H5 121.700
C2 C1 H3 135.886 H4 C2 H5 116.365
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at ROHF/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.136      
2 C -0.403      
3 H 0.183      
4 H 0.175      
5 H 0.181      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.619 -0.190 0.000 0.648
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -12.174 -1.074 0.001
y -1.074 -11.359 -0.001
z 0.001 -0.001 -14.688
Traceless
 xyz
x 0.849 -1.074 0.001
y -1.074 2.072 -0.001
z 0.001 -0.001 -2.921
Polar
3z2-r2-5.843
x2-y2-0.816
xy-1.074
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> 20.222
(<r2>)1/2 4.497