return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: BLYP/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-5182.739405
Energy at 298.15K 
HF Energy-5182.739405
Nuclear repulsion energy344.560624
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/6-31+G**
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 3069 3053 1.53      
2 A1 1404 1396 0.33      
3 A1 539 536 3.88      
4 A1 159 158 0.06      
5 A2 1087 1082 0.00      
6 B1 3164 3147 1.92      
7 B1 803 798 5.11      
8 B2 1191 1185 85.81      
9 B2 557 554 134.39      

Unscaled Zero Point Vibrational Energy (zpe) 5985.8 cm-1
Scaled (by 0.9947) Zero Point Vibrational Energy (zpe) 5954.1 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 BLYP/6-31+G**
ABC
0.84913 0.03909 0.03765

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.955
H2 -0.912 0.000 1.556
H3 0.912 0.000 1.556
Br4 0.000 1.650 -0.126
Br5 0.000 -1.650 -0.126

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.09201.09201.97261.9726
H21.09201.82382.52642.5264
H31.09201.82382.52642.5264
Br41.97262.52642.52643.2996
Br51.97262.52642.52643.2996

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 113.259 H2 C1 Br4 107.550
H2 C1 Br5 107.550 H3 C1 Br4 107.550
H3 C1 Br5 107.550 Br4 C1 Br5 113.513
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.300      
2 H 0.208      
3 H 0.208      
4 Br -0.058      
5 Br -0.058      


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 1.563 1.563
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.992 0.000 0.000
y 0.000 -45.399 0.000
z 0.000 0.000 -41.301
Traceless
 xyz
x -0.642 0.000 0.000
y 0.000 -2.752 0.000
z 0.000 0.000 3.394
Polar
3z2-r26.788
x2-y21.406
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.957 0.000 0.000
y 0.000 11.148 0.000
z 0.000 0.000 6.673


<r2> (average value of r2) Å2
<r2> 230.831
(<r2>)1/2 15.193