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All results from a given calculation for C2Cl2 (dichloroacetylene)

using model chemistry: CCSD/6-31G*

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/6-31G*
 hartrees
Energy at 0K-995.131993
Energy at 298.15K-995.130174
HF Energy-994.593778
Nuclear repulsion energy152.690708
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/6-31G*
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 2371 2239 0.00      
2 Σg 480 453 0.00      
3 Σu 1007 951 40.74      
4 Πg 195 184 0.00      
4 Πg 195 184 0.00      
5 Πu 170 161 0.67      
5 Πu 170 161 0.67      

Unscaled Zero Point Vibrational Energy (zpe) 2294.3 cm-1
Scaled (by 0.9443) Zero Point Vibrational Energy (zpe) 2166.5 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/6-31G*
B
0.04619

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/6-31G*

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 2.257
Cl4 0.000 0.000 -2.257

Atom - Atom Distances (Å)
  C1 C2 Cl3 Cl4
C11.20701.65352.8605
C21.20702.86051.6535
Cl31.65352.86054.5139
Cl42.86051.65354.5139

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