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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: B2PLYP/6-31G*

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/6-31G*
 hartrees
Energy at 0K-5181.694970
Energy at 298.15K-5181.702984
HF Energy-5181.575936
Nuclear repulsion energy349.770164
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/6-31G*
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 3192 3030 2.36      
2 A1 1487 1411 0.58      
3 A1 584 554 5.20      
4 A1 176 168 0.08      
5 A2 1142 1084 0.00      
6 B1 3285 3119 0.63      
7 B1 824 782 4.54      
8 B2 1248 1185 77.52      
9 B2 639 606 94.61      

Unscaled Zero Point Vibrational Energy (zpe) 6288.1 cm-1
Scaled (by 0.9492) Zero Point Vibrational Energy (zpe) 5968.6 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 B2PLYP/6-31G*
ABC
0.86215 0.04039 0.03888

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.944
H2 -0.897 0.000 1.556
H3 0.897 0.000 1.556
Br4 0.000 1.625 -0.125
Br5 0.000 -1.625 -0.125

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08601.08601.94501.9450
H21.08601.79432.50412.5041
H31.08601.79432.50412.5041
Br41.94502.50412.50413.2498
Br51.94502.50412.50413.2498

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 111.402 H2 C1 Br4 108.041
H2 C1 Br5 108.041 H3 C1 Br4 108.041
H3 C1 Br5 108.041 Br4 C1 Br5 113.323
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.319      
2 H 0.238      
3 H 0.238      
4 Br -0.078      
5 Br -0.078      


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 1.587 1.587
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.929 0.000 0.000
y 0.000 -44.291 0.000
z 0.000 0.000 -40.326
Traceless
 xyz
x -0.621 0.000 0.000
y 0.000 -2.663 0.000
z 0.000 0.000 3.285
Polar
3z2-r26.569
x2-y21.361
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.527 0.000 0.000
y 0.000 8.991 0.000
z 0.000 0.000 5.365


<r2> (average value of r2) Å2
<r2> 223.816
(<r2>)1/2 14.960