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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/cc-pVDZ
 hartrees
Energy at 0K-5186.731978
Energy at 298.15K 
HF Energy-5186.731978
Nuclear repulsion energy347.239229
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 PBEPBEultrafine/cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3055 3037 2.17 104.54 0.07 0.12
2 A1 1353 1345 0.02 11.64 0.74 0.85
3 A1 565 562 3.75 12.44 0.09 0.17
4 A1 165 164 0.06 6.55 0.47 0.64
5 A2 1057 1051 0.00 7.35 0.75 0.86
6 B1 3150 3132 1.12 58.75 0.75 0.86
7 B1 779 774 5.60 2.62 0.75 0.86
8 B2 1151 1144 60.45 1.21 0.75 0.86
9 B2 609 606 119.91 3.16 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5942.0 cm-1
Scaled (by 0.9942) Zero Point Vibrational Energy (zpe) 5907.6 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 PBEPBEultrafine/cc-pVDZ
ABC
0.87697 0.03960 0.03818

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.933
H2 -0.915 0.000 1.547
H3 0.915 0.000 1.547
Br4 0.000 1.639 -0.124
Br5 0.000 -1.639 -0.124

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.10211.10211.95031.9503
H21.10211.83082.51312.5131
H31.10211.83082.51312.5131
Br41.95032.51312.51313.2781
Br51.95032.51312.51313.2781

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.327 H2 C1 Br4 107.565
H2 C1 Br5 107.565 H3 C1 Br4 107.565
H3 C1 Br5 107.565 Br4 C1 Br5 114.365
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.196      
2 H 0.131      
3 H 0.131      
4 Br -0.034      
5 Br -0.034      


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 1.420 1.420
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.734 0.000 0.000
y 0.000 -43.605 0.000
z 0.000 0.000 -40.410
Traceless
 xyz
x -0.726 0.000 0.000
y 0.000 -2.033 0.000
z 0.000 0.000 2.759
Polar
3z2-r25.519
x2-y20.872
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.980 0.000 0.000
y 0.000 9.259 0.000
z 0.000 0.000 5.084


<r2> (average value of r2) Å2
<r2> 227.201
(<r2>)1/2 15.073