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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: PBEPBEultrafine/cc-pVTZ-PP

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-PP
 hartrees
Energy at 0K-872.967496
Energy at 298.15K 
HF Energy-872.967496
Nuclear repulsion energy210.109432
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-PP
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 3059 3059 1.64 95.30 0.05 0.10
2 A1 1378 1378 0.01 10.22 0.66 0.80
3 A1 566 566 2.78 14.12 0.07 0.12
4 A1 162 162 0.05 5.17 0.40 0.57
5 A2 1065 1065 0.00 3.00 0.75 0.86
6 B1 3145 3145 1.31 47.08 0.75 0.86
7 B1 787 787 4.81 1.39 0.75 0.86
8 B2 1161 1161 58.42 0.29 0.75 0.86
9 B2 611 611 110.74 3.07 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5966.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 5966.6 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-pVTZ-PP
ABC
0.87859 0.03989 0.03845

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

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 1.539
H3 0.907 0.000 1.539
Br4 0.000 1.633 -0.124
Br5 0.000 -1.633 -0.124

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.09021.09021.94621.9462
H21.09021.81462.50132.5013
H31.09021.81462.50132.5013
Br41.94622.50132.50133.2660
Br51.94622.50132.50133.2660

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.654 H2 C1 Br4 107.556
H2 C1 Br5 107.556 H3 C1 Br4 107.556
H3 C1 Br5 107.556 Br4 C1 Br5 114.084
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/cc-pVTZ-PP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.227      
2 H 0.144      
3 H 0.144      
4 Br -0.031      
5 Br -0.031      


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 1.379 1.379
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.610 0.000 0.000
y 0.000 -43.588 0.000
z 0.000 0.000 -40.283
Traceless
 xyz
x -0.674 0.000 0.000
y 0.000 -2.141 0.000
z 0.000 0.000 2.816
Polar
3z2-r25.631
x2-y20.978
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.533 0.000 0.000
y 0.000 10.741 0.000
z 0.000 0.000 6.459


<r2> (average value of r2) Å2
<r2> 172.064
(<r2>)1/2 13.117