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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: B2PLYP/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B2PLYP/cc-pVDZ
 hartrees
Energy at 0K-5186.653281
Energy at 298.15K 
HF Energy-5186.519303
Nuclear repulsion energy348.816913
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 B2PLYP/cc-pVDZ
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 3153 3019 3.07 99.94 0.07 0.14
2 A1 1427 1367 0.20 11.58 0.73 0.84
3 A1 583 558 4.47 13.78 0.09 0.17
4 A1 172 165 0.07 5.56 0.48 0.65
5 A2 1114 1067 0.00 7.32 0.75 0.86
6 B1 3247 3110 0.84 58.74 0.75 0.86
7 B1 814 780 4.92 2.43 0.75 0.86
8 B2 1216 1165 70.64 0.35 0.75 0.86
9 B2 649 622 97.47 6.15 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6187.1 cm-1
Scaled (by 0.9577) Zero Point Vibrational Energy (zpe) 5925.4 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 B2PLYP/cc-pVDZ
ABC
0.87648 0.04002 0.03857

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.935
H2 -0.907 0.000 1.546
H3 0.907 0.000 1.546
Br4 0.000 1.630 -0.124
Br5 0.000 -1.630 -0.124

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.09321.09321.94411.9441
H21.09321.81332.50372.5037
H31.09321.81332.50372.5037
Br41.94412.50372.50373.2607
Br51.94412.50372.50373.2607

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.074 H2 C1 Br4 107.718
H2 C1 Br5 107.718 H3 C1 Br4 107.718
H3 C1 Br5 107.718 Br4 C1 Br5 113.984
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.156      
2 H 0.122      
3 H 0.122      
4 Br -0.044      
5 Br -0.044      


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 1.491 1.491
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.973 0.000 0.000
y 0.000 -44.141 0.000
z 0.000 0.000 -40.602
Traceless
 xyz
x -0.602 0.000 0.000
y 0.000 -2.353 0.000
z 0.000 0.000 2.955
Polar
3z2-r25.911
x2-y21.168
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.868 0.000 0.000
y 0.000 8.805 0.000
z 0.000 0.000 4.975


<r2> (average value of r2) Å2
<r2> 225.397
(<r2>)1/2 15.013