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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: PBEPBEultrafine/cc-pVTZ

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-pVTZ
 hartrees
Energy at 0K-5186.895427
Energy at 298.15K 
HF Energy-5186.895427
Nuclear repulsion energy348.538889
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-pVTZ
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 3061 3040 1.66 95.72 0.06 0.11
2 A1 1381 1371 0.00 10.92 0.65 0.79
3 A1 567 563 3.10 13.89 0.07 0.13
4 A1 164 163 0.07 5.30 0.42 0.59
5 A2 1072 1065 0.00 3.06 0.75 0.86
6 B1 3145 3123 1.34 47.52 0.75 0.86
7 B1 789 784 4.71 1.34 0.75 0.86
8 B2 1166 1158 57.70 0.38 0.75 0.86
9 B2 613 608 112.68 3.10 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5978.4 cm-1
Scaled (by 0.9931) Zero Point Vibrational Energy (zpe) 5937.1 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-pVTZ
ABC
0.88125 0.03991 0.03847

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.933
H2 -0.907 0.000 1.538
H3 0.907 0.000 1.538
Br4 0.000 1.633 -0.124
Br5 0.000 -1.633 -0.124

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.09011.09011.94491.9449
H21.09011.81312.50012.5001
H31.09011.81312.50012.5001
Br41.94492.50012.50013.2655
Br51.94492.50012.50013.2655

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.527 H2 C1 Br4 107.563
H2 C1 Br5 107.563 H3 C1 Br4 107.563
H3 C1 Br5 107.563 Br4 C1 Br5 114.179
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.178      
2 H 0.142      
3 H 0.142      
4 Br -0.053      
5 Br -0.053      


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 1.461 1.461
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.247 0.000 0.000
y 0.000 -44.538 0.000
z 0.000 0.000 -40.904
Traceless
 xyz
x -0.526 0.000 0.000
y 0.000 -2.462 0.000
z 0.000 0.000 2.988
Polar
3z2-r25.977
x2-y21.291
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.278 0.000 0.000
y 0.000 10.653 0.000
z 0.000 0.000 6.286


<r2> (average value of r2) Å2
<r2> 226.076
(<r2>)1/2 15.036