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All results from a given calculation for C2Cl2 (dichloroacetylene)

using model chemistry: MP2=FULL/cc-pV(T+d)Z

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=FULL/cc-pV(T+d)Z
 hartrees
Energy at 0K-995.615829
Energy at 298.15K-995.614511
Nuclear repulsion energy154.376616
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/cc-pV(T+d)Z
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 2263 2146 0.00      
2 Σg 487 462 0.00      
3 Σu 1028 975 54.92      
4 Πg 364 345 0.00      
4 Πg 364 345 0.00      
5 Πu 184 174 1.75      
5 Πu 184 174 1.75      

Unscaled Zero Point Vibrational Energy (zpe) 2436.5 cm-1
Scaled (by 0.9481) Zero Point Vibrational Energy (zpe) 2310.1 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/cc-pV(T+d)Z
B
0.04718

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/cc-pV(T+d)Z

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.605
C2 0.000 0.000 -0.605
Cl3 0.000 0.000 2.232
Cl4 0.000 0.000 -2.232

Atom - Atom Distances (Å)
  C1 C2 Cl3 Cl4
C11.21021.62732.8375
C21.21022.83751.6273
Cl31.62732.83754.4648
Cl42.83751.62734.4648

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