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

using model chemistry: MP2/CEP-121G

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/CEP-121G
 hartrees
Energy at 0K-35.072240
Energy at 298.15K-35.076093
HF Energy-34.816942
Nuclear repulsion energy30.060355
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/CEP-121G
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' 3073 2999 30.91      
2 A' 1581 1543 389.92      
3 A' 1333 1301 98.00      
4 A' 600 585 176.15      
5 A' 334 326 21.20      
6 A" 876 855 10.09      

Unscaled Zero Point Vibrational Energy (zpe) 3897.8 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 3804.3 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/CEP-121G
ABC
2.31933 0.12394 0.11765

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.397 -1.250 0.000
O2 -0.483 -2.123 0.000
H3 1.485 -1.408 0.000
Br4 0.000 0.740 0.000

Atom - Atom Distances (Å)
  C1 O2 H3 Br4
C11.23971.10022.0290
O21.23972.09452.9036
H31.10022.09452.6116
Br42.02902.90362.6116

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 126.951 O2 C1 Br4 123.508
H3 C1 Br4 109.541
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability