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: QCISD/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 QCISD/aug-cc-pVTZ
 hartrees
Energy at 0K-498.220290
Energy at 298.15K-498.220155
HF Energy-497.855001
Nuclear repulsion energy38.613383
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/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' 2944 2834 53.62      
2 A' 1236 1189 7.34      
3 A' 816 785 88.90      

Unscaled Zero Point Vibrational Energy (zpe) 2497.7 cm-1
Scaled (by 0.9624) Zero Point Vibrational Energy (zpe) 2403.7 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 QCISD/aug-cc-pVTZ
ABC
15.87564 0.59707 0.57543

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.045 1.197 0.000
Cl2 0.045 -0.506 0.000
H3 -1.038 1.430 0.000

Atom - Atom Distances (Å)
  C1 Cl2 H3
C11.70321.1076
Cl21.70322.2185
H31.10762.2185

picture of Chloromethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Cl2 C1 H3 102.151
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 2 (3A")

Jump to S1C1
Energy calculated at QCISD/aug-cc-pVTZ
 hartrees
Energy at 0K-498.213608
Energy at 298.15K-498.213461
HF Energy-497.879259
Nuclear repulsion energy38.933143
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/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' 3220 3099 4.99      
2 A' 979 942 0.89      
3 A' 891 858 38.82      

Unscaled Zero Point Vibrational Energy (zpe) 2544.8 cm-1
Scaled (by 0.9624) Zero Point Vibrational Energy (zpe) 2449.1 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 QCISD/aug-cc-pVTZ
ABC
25.66781 0.59239 0.57902

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/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 -0.836 1.794 0.000

Atom - Atom Distances (Å)
  C1 Cl2 H3
C11.66861.0811
Cl21.66862.4663
H31.08112.4663

picture of Chloromethylene state 2 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Cl2 C1 H3 126.179
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability