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: CCSD(T)=FULL/TZVP

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 CCSD(T)=FULL/TZVP
 hartrees
Energy at 0K-536.260616
Energy at 298.15K-536.259689
HF Energy-535.756373
Nuclear repulsion energy73.789246
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 CCSD(T)=FULL/TZVP
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 3497 3343        
2 Σ 2162 2067        
3 Σ 734 702        
4 Π 522 499        
4 Π 522 499        
5 Π 204 195        
5 Π 204 195        

Unscaled Zero Point Vibrational Energy (zpe) 3922.0 cm-1
Scaled (by 0.956) Zero Point Vibrational Energy (zpe) 3749.5 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 CCSD(T)=FULL/TZVP
B
0.18595

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/TZVP

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.831
C2 0.000 0.000 -0.623
Cl3 0.000 0.000 1.036
H4 0.000 0.000 -2.894

Atom - Atom Distances (Å)
  C1 C2 Cl3 H4
C11.20862.86791.0622
C21.20861.65932.2708
Cl32.86791.65933.9301
H41.06222.27083.9301

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