return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CCl2O (Phosgene)

using model chemistry: QCISD/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at QCISD/3-21G
 hartrees
Energy at 0K-1026.985335
Energy at 298.15K-1026.985503
HF Energy-1026.643569
Nuclear repulsion energy180.084267
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 QCISD/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 1810 1754 221.98      
2 A1 440 426 20.82      
3 A1 252 244 0.45      
4 B1 510 494 10.85      
5 B2 692 671 458.00      
6 B2 374 362 3.24      

Unscaled Zero Point Vibrational Energy (zpe) 2038.7 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 1975.9 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 QCISD/3-21G
ABC
0.23034 0.10159 0.07050

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.773
C2 0.000 0.000 0.580
Cl3 0.000 1.540 -0.520
Cl4 0.000 -1.540 -0.520

Atom - Atom Distances (Å)
  O1 C2 Cl3 Cl4
O11.19342.76202.7620
C21.19341.89241.8924
Cl32.76201.89243.0807
Cl42.76201.89243.0807

picture of Phosgene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 Cl3 125.514 O1 C2 Cl4 125.514
Cl3 C2 Cl4 108.972
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability