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 COHBr (Formyl bromide)

using model chemistry: MP2/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-31G**
 hartrees
Energy at 0K-2683.611006
Energy at 298.15K-2683.614918
HF Energy-2683.185477
Nuclear repulsion energy142.973822
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 MP2/6-31G**
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' 3163 2962 25.05      
2 A' 1817 1702 343.38      
3 A' 1352 1266 73.33      
4 A' 653 611 178.20      
5 A' 357 335 15.20      
6 A" 923 865 3.00      

Unscaled Zero Point Vibrational Energy (zpe) 4132.4 cm-1
Scaled (by 0.9365) Zero Point Vibrational Energy (zpe) 3870.0 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 MP2/6-31G**
ABC
2.46275 0.13267 0.12589

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.380 -1.209 0.000
O2 -0.468 -2.052 0.000
H3 1.462 -1.360 0.000
Br4 0.000 0.715 0.000

Atom - Atom Distances (Å)
  C1 O2 H3 Br4
C11.19591.09241.9610
O21.19592.05042.8063
H31.09242.05042.5383
Br41.96102.80632.5383

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 127.221 O2 C1 Br4 123.651
H3 C1 Br4 109.127
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability