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All results from a given calculation for C2Cl2 (dichloroacetylene)

using model chemistry: MP2/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Σg
Energy calculated at MP2/Def2TZVPP
 hartrees
Energy at 0K-995.360918
Energy at 298.15K-995.359526
HF Energy-994.684475
Nuclear repulsion energy153.838536
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/Def2TZVPP
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 2230 2121 0.00      
2 Σg 484 460 0.00      
3 Σu 1022 973 56.72      
4 Πg 342 325 0.00      
4 Πg 342 325 0.00      
5 Πu 179 170 1.92      
5 Πu 179 170 1.92      

Unscaled Zero Point Vibrational Energy (zpe) 2388.7 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 2272.9 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/Def2TZVPP
B
0.04685

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/Def2TZVPP

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.606
C2 0.000 0.000 -0.606
Cl3 0.000 0.000 2.243
Cl4 0.000 0.000 -2.243

Atom - Atom Distances (Å)
  C1 C2 Cl3 Cl4
C11.21201.63702.8490
C21.21202.84901.6370
Cl31.63702.84904.4861
Cl42.84901.63704.4861

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