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: CCD/cc-pVTZ

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 CCD/cc-pVTZ
 hartrees
Energy at 0K-536.281942
Energy at 298.15K-536.281566
HF Energy-535.774686
Nuclear repulsion energy74.303502
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 CCD/cc-pVTZ
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 3507 3275 86.14      
2 Σ 2219 2072 28.17      
3 Σ 761 710 8.27      
4 Π 657 614 45.52      
4 Π 657 614 45.52      
5 Π 351 327 3.35      
5 Π 351 327 3.35      

Unscaled Zero Point Vibrational Energy (zpe) 4251.2 cm-1
Scaled (by 0.9337) Zero Point Vibrational Energy (zpe) 3969.3 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 CCD/cc-pVTZ
B
0.18860

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/cc-pVTZ

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 -0.618
Cl3 0.000 0.000 1.029
H4 0.000 0.000 -2.879

Atom - Atom Distances (Å)
  C1 C2 Cl3 H4
C11.20032.84721.0605
C21.20031.64692.2607
Cl32.84721.64693.9077
H41.06052.26073.9077

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