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: MP4=FULL/aug-cc-pVDZ

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 MP4=FULL/aug-cc-pVDZ
 hartrees
Energy at 0K-498.143258
Energy at 298.15K-498.143115
HF Energy-497.832048
Nuclear repulsion energy38.093722
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 MP4=FULL/aug-cc-pVDZ
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' 2898 2826        
2 A' 1225 1194        
3 A' 793 774        

Unscaled Zero Point Vibrational Energy (zpe) 2458.1 cm-1
Scaled (by 0.9752) Zero Point Vibrational Energy (zpe) 2397.1 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 MP4=FULL/aug-cc-pVDZ
ABC
15.21698 0.58177 0.56035

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.046 1.214 0.000
Cl2 0.046 -0.513 0.000
H3 -1.059 1.431 0.000

Atom - Atom Distances (Å)
  C1 Cl2 H3
C11.72721.1260
Cl21.72722.2361
H31.12602.2361

picture of Chloromethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Cl2 C1 H3 101.106
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 2 (3A")

Jump to S1C1
Energy calculated at MP4=FULL/aug-cc-pVDZ
 hartrees
Energy at 0K-498.134209
Energy at 298.15K-498.134059
HF Energy-497.855221
Nuclear repulsion energy38.410836
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 MP4=FULL/aug-cc-pVDZ
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' 982 958        
2 A' 873 852        
3 A' 3201 3121        

Unscaled Zero Point Vibrational Energy (zpe) 2527.9 cm-1
Scaled (by 0.9752) Zero Point Vibrational Energy (zpe) 2465.3 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 MP4=FULL/aug-cc-pVDZ
ABC
24.78057 0.57681 0.56369

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.037 1.171 0.000
Cl2 0.037 -0.520 0.000
H3 -0.851 1.814 0.000

Atom - Atom Distances (Å)
  C1 Cl2 H3
C11.69141.0961
Cl21.69142.4973
H31.09612.4973

picture of Chloromethylene state 2 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Cl2 C1 H3 125.900
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability