return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for COHBr (Formyl bromide)

using model chemistry: MP2/SDD

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/SDD
 hartrees
Energy at 0K-126.632094
Energy at 298.15K-126.635920
HF Energy-126.376107
Nuclear repulsion energy48.021808
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/SDD
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' 3138 3029 28.71      
2 A' 1598 1543 397.44      
3 A' 1326 1280 113.67      
4 A' 589 568 181.26      
5 A' 330 318 24.43      
6 A" 877 846 9.60      

Unscaled Zero Point Vibrational Energy (zpe) 3928.7 cm-1
Scaled (by 0.9653) Zero Point Vibrational Energy (zpe) 3792.4 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/SDD
ABC
2.32709 0.12362 0.11738

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/SDD

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.395 -1.256 0.000
O2 -0.482 -2.124 0.000
H3 1.484 -1.409 0.000
Br4 0.000 0.741 0.000

Atom - Atom Distances (Å)
  C1 O2 H3 Br4
C11.23461.09962.0355
O21.23462.09272.9053
H31.09962.09272.6123
Br42.03552.90532.6123

picture of Formyl bromide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O2 C1 H3 127.316 O2 C1 Br4 123.490
H3 C1 Br4 109.193
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability