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 CHClBr2 (Methane, dibromochloro-)

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-5616.641282
Energy at 298.15K-5616.648376
HF Energy-5616.150622
Nuclear repulsion energy573.180593
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 MP2/3-21G*
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' 3221 3064 1.07      
2 A' 1276 1213 20.71      
3 A' 723 688 109.03      
4 A' 586 558 3.86      
5 A' 280 267 0.09      
6 A' 170 162 0.05      
7 A" 1222 1162 34.42      
8 A" 703 669 92.98      
9 A" 204 194 0.13      

Unscaled Zero Point Vibrational Energy (zpe) 4192.0 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 3987.8 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 MP2/3-21G*
ABC
0.08115 0.04118 0.02791

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.243 0.621 0.000
H2 -1.157 1.206 0.000
Cl3 1.154 1.739 0.000
Br4 -0.243 -0.493 1.598
Br5 -0.243 -0.493 -1.598

Atom - Atom Distances (Å)
  C1 H2 Cl3 Br4 Br5
C11.08551.78931.94731.9473
H21.08552.37202.50452.5045
Cl31.78932.37203.07963.0796
Br41.94732.50453.07963.1951
Br51.94732.50453.07963.1951

picture of Methane, dibromochloro- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 Cl3 108.719 H2 C1 Br4 107.943
H2 C1 Br5 107.943 Cl3 C1 Br4 110.938
Cl3 C1 Br5 110.938 Br4 C1 Br5 110.249
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability