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All results from a given calculation for COBr2 (Carbonic dibromide)

using model chemistry: PBEPBE/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 PBEPBE/3-21G*
 hartrees
Energy at 0K-5235.841476
Energy at 298.15K-5235.847341
HF Energy-5235.841476
Nuclear repulsion energy446.550878
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 PBEPBE/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 1750 1669 211.42      
2 A1 432 412 5.43      
3 A1 181 172 0.16      
4 B1 526 502 0.86      
5 B2 706 673 425.85      
6 B2 331 316 3.70      

Unscaled Zero Point Vibrational Energy (zpe) 1962.8 cm-1
Scaled (by 0.9535) Zero Point Vibrational Energy (zpe) 1871.6 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 PBEPBE/3-21G*
ABC
0.19211 0.04283 0.03502

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.815
O2 0.000 0.000 2.025
Br3 0.000 1.579 -0.301
Br4 0.000 -1.579 -0.301

Atom - Atom Distances (Å)
  C1 O2 Br3 Br4
C11.21011.93401.9340
O21.21012.81192.8119
Br31.93402.81193.1583
Br41.93402.81193.1583

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 125.261 O2 C1 Br4 125.261
Br3 C1 Br4 109.479
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.256      
2 O -0.330      
3 Br 0.037      
4 Br 0.037      


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 -1.255 1.255
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -45.882 0.000 0.000
y 0.000 -43.576 0.000
z 0.000 0.000 -48.901
Traceless
 xyz
x 0.356 0.000 0.000
y 0.000 3.815 0.000
z 0.000 0.000 -4.172
Polar
3z2-r2-8.343
x2-y2-2.306
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.381 0.000 0.000
y 0.000 9.669 0.000
z 0.000 0.000 6.360


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