return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for HCCCl (Chloroacetylene)

using model chemistry: HF/SDD

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/SDD
 hartrees
Energy at 0K-535.647209
Energy at 298.15K-535.647031
HF Energy-535.647209
Nuclear repulsion energy73.135307
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/SDD
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 3685 3318 84.47      
2 Σ 2362 2127 21.04      
3 Σ 727 654 3.28      
4 Π 848 763 65.70      
4 Π 848 763 65.70      
5 Π 389 350 9.71      
5 Π 389 350 9.71      

Unscaled Zero Point Vibrational Energy (zpe) 4622.9 cm-1
Scaled (by 0.9004) Zero Point Vibrational Energy (zpe) 4162.5 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 HF/SDD
B
0.18235

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/SDD

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.842
C2 0.000 0.000 -0.648
Cl3 0.000 0.000 1.049
H4 0.000 0.000 -2.895

Atom - Atom Distances (Å)
  C1 C2 Cl3 H4
C11.19362.89111.0536
C21.19361.69752.2472
Cl32.89111.69753.9447
H41.05362.24723.9447

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/SDD Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.182      
2 C -0.116      
3 Cl 0.027      
4 H 0.271      


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 -1.115 1.115
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.299 0.000 0.000
y 0.000 -25.299 0.000
z 0.000 0.000 -18.343
Traceless
 xyz
x -3.478 0.000 0.000
y 0.000 -3.478 0.000
z 0.000 0.000 6.956
Polar
3z2-r213.912
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 1.472 0.000 0.000
y 0.000 1.472 0.000
z 0.000 0.000 6.888


<r2> (average value of r2) Å2
<r2> 64.327
(<r2>)1/2 8.020