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/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 CCD/6-31+G**
 hartrees
Energy at 0K-536.117651
Energy at 298.15K-536.116904
HF Energy-535.712367
Nuclear repulsion energy73.945279
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/6-31+G**
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 3536 3332 78.00      
2 Σ 2226 2098 31.03      
3 Σ 759 715 8.88      
4 Π 572 539 58.25      
4 Π 572 539 58.25      
5 Π 243 229 0.13      
5 Π 243 229 0.13      

Unscaled Zero Point Vibrational Energy (zpe) 4075.3 cm-1
Scaled (by 0.9423) Zero Point Vibrational Energy (zpe) 3840.2 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/6-31+G**
B
0.18677

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.828
C2 0.000 0.000 -0.619
Cl3 0.000 0.000 1.034
H4 0.000 0.000 -2.891

Atom - Atom Distances (Å)
  C1 C2 Cl3 H4
C11.20952.86211.0630
C21.20951.65272.2725
Cl32.86211.65273.9252
H41.06302.27253.9252

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