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 CHBr (bromomethylene)

using model chemistry: CCD/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
2 1 yes CS 3A"

State 1 (1A')

Jump to S2C1
Energy calculated at CCD/aug-cc-pVTZ
 hartrees
Energy at 0K-2611.189454
Energy at 298.15K-2611.192188
HF Energy-2610.795416
Nuclear repulsion energy70.819540
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 CCD/aug-cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 2976 2848 35.99      
2 A' 1171 1120 4.23      
3 A' 698 668 78.36      

Unscaled Zero Point Vibrational Energy (zpe) 2422.2 cm-1
Scaled (by 0.957) Zero Point Vibrational Energy (zpe) 2318.1 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 CCD/aug-cc-pVTZ
ABC
15.79473 0.43080 0.41936

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.026 1.537 0.000
Br2 0.026 -0.314 0.000
H3 -1.058 1.759 0.000

Atom - Atom Distances (Å)
  C1 Br2 H3
C11.85121.1058
Br21.85122.3388
H31.10582.3388

picture of bromomethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 H3 101.554
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 2 (3A")

Jump to S1C1
Energy calculated at CCD/aug-cc-pVTZ
 hartrees
Energy at 0K-2611.184589
Energy at 298.15K-2611.187311
HF Energy-2610.822186
Nuclear repulsion energy71.297298
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 CCD/aug-cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3235 3096 4.62      
2 A' 933 893 2.02      
3 A' 758 726 22.93      

Unscaled Zero Point Vibrational Energy (zpe) 2463.5 cm-1
Scaled (by 0.957) Zero Point Vibrational Energy (zpe) 2357.6 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 CCD/aug-cc-pVTZ
ABC
26.34004 0.42881 0.42194

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.020 1.496 0.000
Br2 0.020 -0.318 0.000
H3 -0.838 2.152 0.000

Atom - Atom Distances (Å)
  C1 Br2 H3
C11.81361.0803
Br21.81362.6145
H31.08032.6145

picture of bromomethylene state 2 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability