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All results from a given calculation for C2Cl2 (dichloroacetylene)

using model chemistry: TPSSh/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Σg
Energy calculated at TPSSh/6-31G(2df,p)
 hartrees
Energy at 0K-996.523422
Energy at 298.15K-996.522016
HF Energy-996.523422
Nuclear repulsion energy154.001047
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 TPSSh/6-31G(2df,p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σg 2323 2242 0.00      
2 Σg 482 465 0.00      
3 Σu 1010 974 60.27      
4 Πg 332 320 0.00      
5 Πg 332 320 0.00      
6 Πu 184 177 1.35      
7 Πu 184 177 1.35      

Unscaled Zero Point Vibrational Energy (zpe) 2422.6 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 2337.8 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 TPSSh/6-31G(2df,p)
B
0.04696

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/6-31G(2df,p)

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.603
C2 0.000 0.000 -0.603
Cl3 0.000 0.000 2.241
Cl4 0.000 0.000 -2.241

Atom - Atom Distances (Å)
  C1 C2 Cl3 Cl4
C11.20551.63832.8437
C21.20552.84371.6383
Cl31.63832.84374.4820
Cl42.84371.63834.4820

picture of dichloroacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Cl4 180.000 C2 C1 Cl3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability