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All results from a given calculation for C2Cl2 (dichloroacetylene)

using model chemistry: CCSD(T)/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Σg
Energy calculated at CCSD(T)/cc-pVTZ
 hartrees
Energy at 0K-995.434126
Energy at 298.15K-995.432695
HF Energy-994.696658
Nuclear repulsion energy152.932004
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)/cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Σg 2289 2231        
2 Σg 472 460        
3 Σu 993 968        
4 Πg 333 325        
4 Πg 333 325        
5 Πu 175 170        
5 Πu 175 170        

Unscaled Zero Point Vibrational Energy (zpe) 2384.8 cm-1
Scaled (by 0.9748) Zero Point Vibrational Energy (zpe) 2324.7 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)/cc-pVTZ
B
0.04633

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/cc-pVTZ

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.604
C2 0.000 0.000 -0.604
Cl3 0.000 0.000 2.253
Cl4 0.000 0.000 -2.253

Atom - Atom Distances (Å)
  C1 C2 Cl3 Cl4
C11.20871.64902.8577
C21.20872.85771.6490
Cl31.64902.85774.5066
Cl42.85771.64904.5066

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