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/6-31G*

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/6-31G*
 hartrees
Energy at 0K-498.081988
Energy at 298.15K-498.081853
HF Energy-497.796911
Nuclear repulsion energy38.399145
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/6-31G*
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' 2899 2787        
2 A' 1279 1230        
3 A' 822 790        

Unscaled Zero Point Vibrational Energy (zpe) 2500.0 cm-1
Scaled (by 0.9616) Zero Point Vibrational Energy (zpe) 2404.0 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 MP4=FULL/6-31G*
ABC
15.61783 0.59087 0.56933

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.046 1.202 0.000
Cl2 0.046 -0.509 0.000
H3 -1.047 1.442 0.000

Atom - Atom Distances (Å)
  C1 Cl2 H3
C11.71161.1180
Cl21.71162.2360
H31.11802.2360

picture of Chloromethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Cl2 C1 H3 102.374
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 2 (3A")

Jump to S1C1
Energy calculated at MP4=FULL/6-31G*
 hartrees
Energy at 0K-498.080276
Energy at 298.15K-498.080136
HF Energy-497.825469
Nuclear repulsion energy38.738699
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/6-31G*
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' 1030 991        
2 A' 902 868        
3 A' 3248 3123        

Unscaled Zero Point Vibrational Energy (zpe) 2590.0 cm-1
Scaled (by 0.9616) Zero Point Vibrational Energy (zpe) 2490.5 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/6-31G*
ABC
25.21915 0.58666 0.57333

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.037 1.161 0.000
Cl2 0.037 -0.516 0.000
H3 -0.843 1.798 0.000

Atom - Atom Distances (Å)
  C1 Cl2 H3
C11.67721.0864
Cl21.67722.4758
H31.08642.4758

picture of Chloromethylene state 2 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Cl2 C1 H3 125.889
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability