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: B3PW91/6-31G*

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 B3PW91/6-31G*
 hartrees
Energy at 0K-2610.234199
Energy at 298.15K-2610.236918
HF Energy-2610.234199
Nuclear repulsion energy70.110088
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 B3PW91/6-31G*
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' 2912 2786 78.38      
2 A' 1192 1141 3.36      
3 A' 674 645 65.91      

Unscaled Zero Point Vibrational Energy (zpe) 2389.2 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 2285.7 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 B3PW91/6-31G*
ABC
15.29218 0.42236 0.41101

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.026 1.555 0.000
Br2 0.026 -0.317 0.000
H3 -1.074 1.753 0.000

Atom - Atom Distances (Å)
  C1 Br2 H3
C11.87191.1174
Br21.87192.3438
H31.11742.3438

picture of bromomethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 H3 100.200
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.160      
2 Br -0.020      
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
  -1.380 -0.660 0.000 1.530
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.967 -2.989 0.000
y -2.989 -25.263 0.000
z 0.000 0.000 -23.404
Traceless
 xyz
x -0.633 -2.989 0.000
y -2.989 -1.078 0.000
z 0.000 0.000 1.711
Polar
3z2-r23.422
x2-y20.297
xy-2.989
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.173 -0.352 0.000
y -0.352 5.954 0.000
z 0.000 0.000 2.606


<r2> (average value of r2) Å2
<r2> 37.606
(<r2>)1/2 6.132

State 2 (3A")

Jump to S1C1
Energy calculated at B3PW91/6-31G*
 hartrees
Energy at 0K-2610.235346
Energy at 298.15K-2610.238053
HF Energy-2610.235346
Nuclear repulsion energy71.082737
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 B3PW91/6-31G*
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' 3225 3085 7.34      
2 A' 920 880 4.12      
3 A' 744 712 26.64      

Unscaled Zero Point Vibrational Energy (zpe) 2444.2 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 2338.4 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 B3PW91/6-31G*
ABC
25.28929 0.42670 0.41962

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.021 1.501 0.000
Br2 0.021 -0.319 0.000
H3 -0.854 2.145 0.000

Atom - Atom Distances (Å)
  C1 Br2 H3
C11.81951.0866
Br21.81952.6142
H31.08662.6142

picture of bromomethylene state 2 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.196      
2 Br -0.016      
3 H 0.211      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.752 0.246 0.000 0.792
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.884 -1.724 0.000
y -1.724 -21.561 0.000
z 0.000 0.000 -25.025
Traceless
 xyz
x -0.591 -1.724 0.000
y -1.724 2.893 0.000
z 0.000 0.000 -2.302
Polar
3z2-r2-4.604
x2-y2-2.323
xy-1.724
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.718 -0.233 0.000
y -0.233 5.511 0.000
z 0.000 0.000 2.337


<r2> (average value of r2) Å2
<r2> 37.088
(<r2>)1/2 6.090