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: HSEh1PBE/3-21G*

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 HSEh1PBE/3-21G*
 hartrees
Energy at 0K-2599.997503
Energy at 298.15K-2600.000228
HF Energy-2599.997503
Nuclear repulsion energy69.580474
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 HSEh1PBE/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' 2795 2683 91.71      
2 A' 1185 1137 8.32      
3 A' 683 656 66.35      

Unscaled Zero Point Vibrational Energy (zpe) 2331.2 cm-1
Scaled (by 0.9599) Zero Point Vibrational Energy (zpe) 2237.7 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 HSEh1PBE/3-21G*
ABC
15.03897 0.41610 0.40490

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.026 1.566 0.000
Br2 0.026 -0.319 0.000
H3 -1.083 1.773 0.000

Atom - Atom Distances (Å)
  C1 Br2 H3
C11.88521.1285
Br21.88522.3683
H31.12852.3683

picture of bromomethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 H3 100.578
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.213      
2 Br 0.010      
3 H 0.202      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.507 -0.849 0.000 1.730
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.057 -3.193 0.000
y -3.193 -25.460 0.000
z 0.000 0.000 -23.471
Traceless
 xyz
x -0.592 -3.193 0.000
y -3.193 -1.196 0.000
z 0.000 0.000 1.787
Polar
3z2-r23.575
x2-y20.403
xy-3.193
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.861 -0.405 0.000
y -0.405 5.745 0.000
z 0.000 0.000 2.342


<r2> (average value of r2) Å2
<r2> 38.030
(<r2>)1/2 6.167

State 2 (3A")

Jump to S1C1
Energy calculated at HSEh1PBE/3-21G*
 hartrees
Energy at 0K-2600.005542
Energy at 298.15K-2600.008264
HF Energy-2600.005542
Nuclear repulsion energy70.874474
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 HSEh1PBE/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' 3202 3073 7.47      
2 A' 928 891 4.26      
3 A' 772 741 25.60      

Unscaled Zero Point Vibrational Energy (zpe) 2450.8 cm-1
Scaled (by 0.9599) Zero Point Vibrational Energy (zpe) 2352.6 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 HSEh1PBE/3-21G*
ABC
25.56085 0.42397 0.41705

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.021 1.505 0.000
Br2 0.021 -0.320 0.000
H3 -0.850 2.156 0.000

Atom - Atom Distances (Å)
  C1 Br2 H3
C11.82491.0869
Br21.82492.6240
H31.08692.6240

picture of bromomethylene state 2 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.253      
2 Br 0.013      
3 H 0.241      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.811 0.081 0.000 0.815
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.923 -1.844 0.000
y -1.844 -21.566 0.000
z 0.000 0.000 -25.072
Traceless
 xyz
x -0.604 -1.844 0.000
y -1.844 2.931 0.000
z 0.000 0.000 -2.327
Polar
3z2-r2-4.654
x2-y2-2.357
xy-1.844
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.340 -0.245 0.000
y -0.245 5.195 0.000
z 0.000 0.000 1.926


<r2> (average value of r2) Å2
<r2> 37.248
(<r2>)1/2 6.103