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 HCCl (Chloromethylene)

using model chemistry: CCSD/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
2 1 yes CS 3A"

State 1 (1A')

Jump to S2C1
Energy calculated at CCSD/aug-cc-pVTZ
 hartrees
Energy at 0K-498.219085
Energy at 298.15K-498.218952
HF Energy-497.855032
Nuclear repulsion energy38.663207
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/aug-cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 2950 2820 51.83      
2 A' 1237 1182 7.11      
3 A' 823 787 97.06      

Unscaled Zero Point Vibrational Energy (zpe) 2505.0 cm-1
Scaled (by 0.9558) Zero Point Vibrational Energy (zpe) 2394.2 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/aug-cc-pVTZ
ABC
15.92323 0.59865 0.57696

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.045 1.195 0.000
Cl2 0.045 -0.506 0.000
H3 -1.036 1.432 0.000

Atom - Atom Distances (Å)
  C1 Cl2 H3
C11.70051.1071
Cl21.70052.2189
H31.10712.2189

picture of Chloromethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Cl2 C1 H3 102.364
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 2 (3A")

Jump to S1C1
Energy calculated at CCSD/aug-cc-pVTZ
 hartrees
Energy at 0K-498.212817
Energy at 298.15K-498.212670
HF Energy-497.879252
Nuclear repulsion energy38.945381
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/aug-cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 981 938 0.74      
2 A' 892 853 40.42      
3 A' 3222 3080 4.98      

Unscaled Zero Point Vibrational Energy (zpe) 2547.7 cm-1
Scaled (by 0.9558) Zero Point Vibrational Energy (zpe) 2435.0 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/aug-cc-pVTZ
ABC
25.77707 0.59268 0.57936

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.036 1.155 0.000
Cl2 0.036 -0.513 0.000
H3 -0.835 1.795 0.000

Atom - Atom Distances (Å)
  C1 Cl2 H3
C11.66791.0809
Cl21.66792.4670
H31.08092.4670

picture of Chloromethylene state 2 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Cl2 C1 H3 126.318
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability