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: MP2=FULL/STO-3G

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 MP2=FULL/STO-3G
 hartrees
Energy at 0K-530.006946
Energy at 298.15K-530.006384
HF Energy-529.842097
Nuclear repulsion energy71.623625
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 MP2=FULL/STO-3G
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 3731 3317 133.71      
2 Σ 2271 2019 0.02      
3 Σ 759 675 3.02      
4 Π 726 646 12.27      
4 Π 726 646 12.27      
5 Π 321 285 0.01      
5 Π 321 285 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 4428.0 cm-1
Scaled (by 0.8889) Zero Point Vibrational Energy (zpe) 3936.1 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 MP2=FULL/STO-3G
B
0.17496

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/STO-3G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.881
C2 0.000 0.000 -0.660
Cl3 0.000 0.000 1.071
H4 0.000 0.000 -2.962

Atom - Atom Distances (Å)
  C1 C2 Cl3 H4
C11.22092.95161.0815
C21.22091.73072.3024
Cl32.95161.73074.0331
H41.08152.30244.0331

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