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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: BLYP/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at BLYP/TZVP
 hartrees
Energy at 0K-5187.654100
Energy at 298.15K 
HF Energy-5187.654100
Nuclear repulsion energy342.449737
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 BLYP/TZVP
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 3068 3060 2.25 100.71 0.07 0.13
2 A1 1393 1389 0.39 18.06 0.62 0.77
3 A1 533 532 4.15 14.17 0.12 0.21
4 A1 158 158 0.05 7.57 0.47 0.64
5 A2 1068 1066 0.00 4.64 0.75 0.86
6 B1 3158 3150 0.81 55.90 0.75 0.86
7 B1 785 783 5.79 2.87 0.75 0.86
8 B2 1179 1176 81.59 1.61 0.75 0.86
9 B2 555 553 136.45 6.20 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5948.2 cm-1
Scaled (by 0.9975) Zero Point Vibrational Energy (zpe) 5933.3 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 BLYP/TZVP
ABC
0.86740 0.03837 0.03701

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.943
H2 -0.908 0.000 1.542
H3 0.908 0.000 1.542
Br4 0.000 1.665 -0.125
Br5 0.000 -1.665 -0.125

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08741.08741.97841.9784
H21.08741.81542.52512.5251
H31.08741.81542.52512.5251
Br41.97842.52512.52513.3304
Br51.97842.52512.52513.3304

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 113.175 H2 C1 Br4 107.298
H2 C1 Br5 107.298 H3 C1 Br4 107.298
H3 C1 Br5 107.298 Br4 C1 Br5 114.636
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.207      
2 H 0.175      
3 H 0.175      
4 Br -0.072      
5 Br -0.072      


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 1.556 1.556
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.666 0.000 0.000
y 0.000 -44.982 0.000
z 0.000 0.000 -41.200
Traceless
 xyz
x -0.575 0.000 0.000
y 0.000 -2.549 0.000
z 0.000 0.000 3.125
Polar
3z2-r26.249
x2-y21.316
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.613 0.000 0.000
y 0.000 10.640 0.000
z 0.000 0.000 5.746


<r2> (average value of r2) Å2
<r2> 233.978
(<r2>)1/2 15.296