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: PBEPBE/6-31G(2df,p)

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 PBEPBE/6-31G(2df,p)
 hartrees
Energy at 0K-2609.982633
Energy at 298.15K-2609.985361
HF Energy-2609.982633
Nuclear repulsion energy70.554745
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 PBEPBE/6-31G(2df,p)
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' 2798 2770 62.85      
2 A' 1128 1116 3.08      
3 A' 702 695 42.89      

Unscaled Zero Point Vibrational Energy (zpe) 2314.4 cm-1
Scaled (by 0.9897) Zero Point Vibrational Energy (zpe) 2290.5 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 PBEPBE/6-31G(2df,p)
ABC
14.97522 0.42870 0.41677

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.026 1.543 0.000
Br2 0.026 -0.314 0.000
H3 -1.085 1.742 0.000

Atom - Atom Distances (Å)
  C1 Br2 H3
C11.85771.1291
Br21.85772.3377
H31.12912.3377

picture of bromomethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 H3 100.145
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.289      
2 Br 0.117      
3 H 0.172      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.160 -0.801 0.000 1.409
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.826 -2.667 0.000
y -2.667 -25.470 0.000
z 0.000 0.000 -23.349
Traceless
 xyz
x -0.417 -2.667 0.000
y -2.667 -1.382 0.000
z 0.000 0.000 1.799
Polar
3z2-r23.598
x2-y20.643
xy-2.667
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.901 -0.308 0.000
y -0.308 6.414 0.000
z 0.000 0.000 3.310


<r2> (average value of r2) Å2
<r2> 37.324
(<r2>)1/2 6.109

State 2 (3A")

Jump to S1C1
Energy calculated at PBEPBE/6-31G(2df,p)
 hartrees
Energy at 0K-2609.979047
Energy at 298.15K-2609.981761
HF Energy-2609.979047
Nuclear repulsion energy71.691119
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 PBEPBE/6-31G(2df,p)
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' 3136 3104 4.79      
2 A' 881 872 7.29      
3 A' 778 770 18.56      

Unscaled Zero Point Vibrational Energy (zpe) 2397.6 cm-1
Scaled (by 0.9897) Zero Point Vibrational Energy (zpe) 2372.9 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 PBEPBE/6-31G(2df,p)
ABC
25.54046 0.43425 0.42699

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.021 1.485 0.000
Br2 0.021 -0.316 0.000
H3 -0.851 2.146 0.000

Atom - Atom Distances (Å)
  C1 Br2 H3
C11.80121.0940
Br21.80122.6116
H31.09402.6116

picture of bromomethylene state 2 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.304      
2 Br 0.124      
3 H 0.180      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.678 0.063 0.000 0.681
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.788 -1.638 0.000
y -1.638 -22.033 0.000
z 0.000 0.000 -24.903
Traceless
 xyz
x -0.320 -1.638 0.000
y -1.638 2.313 0.000
z 0.000 0.000 -1.993
Polar
3z2-r2-3.986
x2-y2-1.755
xy-1.638
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.464 -0.234 0.000
y -0.234 6.138 0.000
z 0.000 0.000 3.166


<r2> (average value of r2) Å2
<r2> 36.800
(<r2>)1/2 6.066