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 COBr2 (Carbonic dibromide)

using model chemistry: BLYP/3-21G*

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/3-21G*
 hartrees
Energy at 0K-5236.759284
Energy at 298.15K-5236.765061
HF Energy-5236.759284
Nuclear repulsion energy441.228307
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/3-21G*
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 1737 1726 212.94      
2 A1 403 400 5.80      
3 A1 172 171 0.19      
4 B1 511 507 1.10      
5 B2 663 658 419.82      
6 B2 317 315 7.86      

Unscaled Zero Point Vibrational Energy (zpe) 1900.9 cm-1
Scaled (by 0.9935) Zero Point Vibrational Energy (zpe) 1888.6 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 BLYP/3-21G*
ABC
0.18962 0.04163 0.03413

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.827
O2 0.000 0.000 2.036
Br3 0.000 1.602 -0.304
Br4 0.000 -1.602 -0.304

Atom - Atom Distances (Å)
  C1 O2 Br3 Br4
C11.20841.96091.9609
O21.20842.83532.8353
Br31.96092.83533.2036
Br41.96092.83533.2036

picture of Carbonic dibromide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O2 C1 Br3 125.227 O2 C1 Br4 125.227
Br3 C1 Br4 109.546
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.274      
2 O -0.324      
3 Br 0.025      
4 Br 0.025      


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 -1.153 1.153
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -45.848 0.000 0.000
y 0.000 -43.704 0.000
z 0.000 0.000 -48.797
Traceless
 xyz
x 0.403 0.000 0.000
y 0.000 3.618 0.000
z 0.000 0.000 -4.021
Polar
3z2-r2-8.042
x2-y2-2.143
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.364 0.000 0.000
y 0.000 9.922 0.000
z 0.000 0.000 6.360


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000