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 HCCCl (Chloroacetylene)

using model chemistry: HSEh1PBE/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 1Σ
Energy calculated at HSEh1PBE/6-31+G**
 hartrees
Energy at 0K-536.683013
Energy at 298.15K 
HF Energy-536.683013
Nuclear repulsion energy74.389555
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 HSEh1PBE/6-31+G**
Rotational Constants (cm-1) from geometry optimized at HSEh1PBE/6-31+G**
B
0.18911

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-31+G**

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.818
C2 0.000 0.000 -0.611
Cl3 0.000 0.000 1.027
H4 0.000 0.000 -2.884

Atom - Atom Distances (Å)
  C1 C2 Cl3 H4
C11.20682.84471.0661
C21.20681.63792.2729
Cl32.84471.63793.9108
H41.06612.27293.9108

picture of Chloroacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Cl3 180.000 C2 C1 H4 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.683      
2 C 0.061      
3 Cl 0.391      
4 H 0.230      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -0.439 0.439
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.997 0.000 0.000
y 0.000 -24.997 0.000
z 0.000 0.000 -17.761
Traceless
 xyz
x -3.618 0.000 0.000
y 0.000 -3.618 0.000
z 0.000 0.000 7.235
Polar
3z2-r214.471
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.642 0.000 0.000
y 0.000 2.642 0.000
z 0.000 0.000 8.056


<r2> (average value of r2) Å2
<r2> 62.417
(<r2>)1/2 7.900