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: HF/6-31G**

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 HF/6-31G**
 hartrees
Energy at 0K-535.709726
Energy at 298.15K-535.709556
HF Energy-535.709726
Nuclear repulsion energy74.629193
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 HF/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 Σ 3655 3299 92.23      
2 Σ 2411 2176 21.96      
3 Σ 799 721 7.70      
4 Π 795 717 47.67      
4 Π 795 717 47.67      
5 Π 394 356 4.23      
5 Π 394 356 4.23      

Unscaled Zero Point Vibrational Energy (zpe) 4620.7 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 4170.7 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 HF/6-31G**
B
0.19020

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.806
C2 0.000 0.000 -0.623
Cl3 0.000 0.000 1.026
H4 0.000 0.000 -2.862

Atom - Atom Distances (Å)
  C1 C2 Cl3 H4
C11.18312.83221.0557
C21.18311.64922.2388
Cl32.83221.64923.8880
H41.05572.23883.8880

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 HF/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.264      
2 C -0.108      
3 Cl 0.124      
4 H 0.249      


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 -0.835 0.835
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.807 0.000 0.000
y 0.000 -24.807 0.000
z 0.000 0.000 -17.359
Traceless
 xyz
x -3.724 0.000 0.000
y 0.000 -3.724 0.000
z 0.000 0.000 7.447
Polar
3z2-r214.895
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 1.890 0.000 0.000
y 0.000 1.890 0.000
z 0.000 0.000 6.905


<r2> (average value of r2) Å2
<r2> 61.934
(<r2>)1/2 7.870