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All results from a given calculation for CBr2 (dibromomethylene)

using model chemistry: LSDA/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
2 1 yes C2V 3B1

State 1 (1A1)

Jump to S2C1
Energy calculated at LSDA/6-31G(2df,p)
 hartrees
Energy at 0K-5175.917669
Energy at 298.15K-5175.922733
HF Energy-5175.917669
Nuclear repulsion energy332.868953
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 LSDA/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 A1 627 617 8.23      
2 A1 204 201 0.49      
3 B2 717 706 241.92      

Unscaled Zero Point Vibrational Energy (zpe) 774.3 cm-1
Scaled (by 0.984) Zero Point Vibrational Energy (zpe) 761.9 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 LSDA/6-31G(2df,p)
ABC
1.31151 0.04629 0.04471

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.989
Br2 0.000 1.519 -0.085
Br3 0.000 -1.519 -0.085

Atom - Atom Distances (Å)
  C1 Br2 Br3
C11.86011.8601
Br21.86013.0379
Br31.86013.0379

picture of dibromomethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 Br3 109.496
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.235      
2 Br 0.117      
3 Br 0.117      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -1.171 1.171
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -40.359 0.000 0.000
y 0.000 -38.711 0.000
z 0.000 0.000 -43.819
Traceless
 xyz
x 0.907 0.000 0.000
y 0.000 3.377 0.000
z 0.000 0.000 -4.284
Polar
3z2-r2-8.569
x2-y2-1.647
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.055 0.000 0.000
y 0.000 11.805 0.000
z 0.000 0.000 6.247


<r2> (average value of r2) Å2
<r2> 193.464
(<r2>)1/2 13.909

State 2 (3B1)

Jump to S1C1
Energy calculated at LSDA/6-31G(2df,p)
 hartrees
Energy at 0K-5175.890331
Energy at 298.15K-5175.895406
HF Energy-5175.890331
Nuclear repulsion energy323.705013
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 LSDA/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 A1 547 538 0.08      
2 A1 192 189 0.21      
3 B2 979 964 136.75      

Unscaled Zero Point Vibrational Energy (zpe) 859.0 cm-1
Scaled (by 0.984) Zero Point Vibrational Energy (zpe) 845.2 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 LSDA/6-31G(2df,p)
ABC
2.68198 0.04047 0.03987

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.691
Br2 0.000 1.625 -0.059
Br3 0.000 -1.625 -0.059

Atom - Atom Distances (Å)
  C1 Br2 Br3
C11.78961.7896
Br21.78963.2491
Br31.78963.2491

picture of dibromomethylene state 2 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.237      
2 Br 0.118      
3 Br 0.118      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -0.586 0.586
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -41.771 0.000 0.000
y 0.000 -37.687 0.000
z 0.000 0.000 -41.327
Traceless
 xyz
x -2.264 0.000 0.000
y 0.000 3.862 0.000
z 0.000 0.000 -1.598
Polar
3z2-r2-3.196
x2-y2-4.084
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.038 0.000 0.000
y 0.000 11.624 0.000
z 0.000 0.000 5.598


<r2> (average value of r2) Å2
<r2> 213.002
(<r2>)1/2 14.595