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=FULL/cc-pVQZ

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=FULL/cc-pVQZ
 hartrees
Energy at 0K-498.331203
Energy at 298.15K-498.331075
HF Energy-497.860595
Nuclear repulsion energy38.933690
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=FULL/cc-pVQZ
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' 2974 2974 50.93      
2 A' 1245 1245 8.39      
3 A' 841 841 94.83      

Unscaled Zero Point Vibrational Energy (zpe) 2530.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 2530.3 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=FULL/cc-pVQZ
ABC
16.09050 0.60732 0.58523

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/cc-pVQZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.045 1.186 0.000
Cl2 0.045 -0.502 0.000
H3 -1.031 1.425 0.000

Atom - Atom Distances (Å)
  C1 Cl2 H3
C11.68801.1022
Cl21.68802.2069
H31.10222.2069

picture of Chloromethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Cl2 C1 H3 102.513
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 2 (3A")

Jump to S1C1
Energy calculated at CCSD=FULL/cc-pVQZ
 hartrees
Energy at 0K-498.325854
Energy at 298.15K-498.325711
HF Energy-497.885071
Nuclear repulsion energy39.208729
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=FULL/cc-pVQZ
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' 986 986 0.86      
2 A' 908 908 40.77      
3 A' 3246 3246 5.10      

Unscaled Zero Point Vibrational Energy (zpe) 2569.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 2569.7 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=FULL/cc-pVQZ
ABC
26.28578 0.60068 0.58726

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/cc-pVQZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.036 1.146 0.000
Cl2 0.036 -0.510 0.000
H3 -0.827 1.790 0.000

Atom - Atom Distances (Å)
  C1 Cl2 H3
C11.65591.0764
Cl21.65592.4560
H31.07642.4560

picture of Chloromethylene state 2 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Cl2 C1 H3 126.713
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability