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All results from a given calculation for CHBr3 (bromoform)

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 C3V 1A1
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-7719.510705
Energy at 298.15K-7719.520503
HF Energy-7719.021475
Nuclear repulsion energy803.869830
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 A1 3214 3058 1.54      
2 A1 557 530 1.56      
3 A1 222 211 0.02      
4 E 1217 1158 31.31      
4 E 1217 1158 31.31      
5 E 696 662 81.46      
5 E 696 662 81.46      
6 E 155 147 0.05      
6 E 155 147 0.05      

Unscaled Zero Point Vibrational Energy (zpe) 4063.8 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 3865.9 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
0.04098 0.04098 0.02085

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.564
H2 0.000 0.000 1.650
Br3 0.000 1.848 -0.048
Br4 1.600 -0.924 -0.048
Br5 -1.600 -0.924 -0.048

Atom - Atom Distances (Å)
  C1 H2 Br3 Br4 Br5
C11.08631.94681.94681.9468
H21.08632.50992.50992.5099
Br31.94682.50993.20093.2009
Br41.94682.50993.20093.2009
Br51.94682.50993.20093.2009

picture of bromoform state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 Br3 108.325 H2 C1 Br4 108.325
H2 C1 Br5 108.325 Br3 C1 Br4 110.593
Br3 C1 Br5 110.593 Br4 C1 Br5 110.593
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability