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/STO-3G

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/STO-3G
 hartrees
Energy at 0K-2583.586949
Energy at 298.15K-2583.589663
HF Energy-2583.586949
Nuclear repulsion energy68.120046
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/STO-3G
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' 2876 2628 117.69      
2 A' 1275 1165 12.84      
3 A' 740 676 53.35      

Unscaled Zero Point Vibrational Energy (zpe) 2445.5 cm-1
Scaled (by 0.9136) Zero Point Vibrational Energy (zpe) 2234.2 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/STO-3G
ABC
13.58593 0.40004 0.38860

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.028 1.603 0.000
Br2 0.028 -0.325 0.000
H3 -1.137 1.758 0.000

Atom - Atom Distances (Å)
  C1 Br2 H3
C11.92751.1746
Br21.92752.3859
H31.17462.3859

picture of bromomethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 H3 97.586
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.100      
2 Br 0.067      
3 H 0.034      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.080 -0.609 0.000 1.240
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.645 -1.918 0.000
y -1.918 -24.145 0.000
z 0.000 0.000 -21.027
Traceless
 xyz
x -0.059 -1.918 0.000
y -1.918 -2.309 0.000
z 0.000 0.000 2.368
Polar
3z2-r24.736
x2-y21.500
xy-1.918
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.900 -0.415 0.000
y -0.415 3.389 0.000
z 0.000 0.000 0.891


<r2> (average value of r2) Å2
<r2> 37.636
(<r2>)1/2 6.135

State 2 (3A")

Jump to S1C1
Energy calculated at PBEPBE/STO-3G
 hartrees
Energy at 0K-2583.586892
Energy at 298.15K-2583.589593
HF Energy-2583.586892
Nuclear repulsion energy69.854068
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/STO-3G
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' 3290 3006 0.28      
2 A' 998 911 0.53      
3 A' 812 742 28.76      

Unscaled Zero Point Vibrational Energy (zpe) 2550.0 cm-1
Scaled (by 0.9136) Zero Point Vibrational Energy (zpe) 2329.7 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 PBEPBE/STO-3G
ABC
22.24590 0.41335 0.40581

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.022 1.530 0.000
Br2 0.022 -0.323 0.000
H3 -0.909 2.137 0.000

Atom - Atom Distances (Å)
  C1 Br2 H3
C11.85341.1115
Br21.85342.6310
H31.11152.6310

picture of bromomethylene state 2 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.158      
2 Br 0.079      
3 H 0.079      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.493 0.177 0.000 0.524
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.546 -0.937 0.000
y -0.937 -21.273 0.000
z 0.000 0.000 -22.291
Traceless
 xyz
x 0.236 -0.937 0.000
y -0.937 0.646 0.000
z 0.000 0.000 -0.881
Polar
3z2-r2-1.763
x2-y2-0.273
xy-0.937
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.689 -0.194 0.000
y -0.194 3.160 0.000
z 0.000 0.000 0.407


<r2> (average value of r2) Å2
<r2> 36.676
(<r2>)1/2 6.056