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: mPW1PW91/aug-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 mPW1PW91/aug-cc-pVDZ
 hartrees
Energy at 0K-77.889608
Energy at 298.15K-77.891112
HF Energy-77.889608
Nuclear repulsion energy28.326263
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 mPW1PW91/aug-cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3274 3137 0.48      
2 A' 3198 3064 2.87      
3 A' 3091 2963 3.78      
4 A' 1666 1597 2.12      
5 A' 1381 1323 9.22      
6 A' 1047 1004 8.24      
7 A' 711 682 19.63      
8 A" 935 896 73.49      
9 A" 820 785 18.49      

Unscaled Zero Point Vibrational Energy (zpe) 8061.5 cm-1
Scaled (by 0.9583) Zero Point Vibrational Energy (zpe) 7725.4 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 mPW1PW91/aug-cc-pVDZ
ABC
7.76099 1.08134 0.94910

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.049 0.723 0.000
C2 0.049 -0.589 0.000
H3 -0.681 1.528 0.000
H4 -0.887 -1.162 0.000
H5 0.974 -1.170 0.000

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5
C11.31171.08662.10442.1066
C21.31172.23901.09771.0923
H31.08662.23902.69743.1648
H42.10441.09772.69741.8613
H52.10661.09233.16481.8613

picture of vinyl state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 121.458 C1 C2 H5 122.137
C2 C1 H3 137.792 H4 C2 H5 116.406
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.166      
2 C 0.643      
3 H -0.352      
4 H -0.262      
5 H -0.195      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.614 -0.318 0.000 0.692
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -12.372 -1.222 0.000
y -1.222 -11.361 0.000
z 0.000 0.000 -14.920
Traceless
 xyz
x 0.769 -1.222 0.000
y -1.222 2.285 0.000
z 0.000 0.000 -3.053
Polar
3z2-r2-6.107
x2-y2-1.011
xy-1.222
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.449 -0.077 0.000
y -0.077 5.211 0.000
z 0.000 0.000 3.160


<r2> (average value of r2) Å2
<r2> 20.544
(<r2>)1/2 4.533