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All results from a given calculation for COHBr (Formyl bromide)

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-2673.276549
Energy at 298.15K-2673.280459
HF Energy-2672.920559
Nuclear repulsion energy141.401447
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' 3119 2967 32.57      
2 A' 1657 1576 266.47      
3 A' 1377 1310 84.82      
4 A' 640 609 184.15      
5 A' 357 340 19.42      
6 A" 947 900 4.73      

Unscaled Zero Point Vibrational Energy (zpe) 4048.0 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 3850.8 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
2.44694 0.12933 0.12284

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 0.382 -1.216 0.000
O2 -0.470 -2.085 0.000
H3 1.467 -1.332 0.000
Br4 0.000 0.723 0.000

Atom - Atom Distances (Å)
  C1 O2 H3 Br4
C11.21791.09071.9763
O21.21792.07842.8476
H31.09072.07842.5252
Br41.97632.84762.5252

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 128.311 O2 C1 Br4 124.401
H3 C1 Br4 107.289
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability