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 PBr3 (Phosphorus tribromide)

using model chemistry: B3LYP/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at B3LYP/CEP-31G
 hartrees
Energy at 0K-46.669843
Energy at 298.15K-46.678634
HF Energy-46.669843
Nuclear repulsion energy43.857152
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 B3LYP/CEP-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 331 321 16.31      
2 A1 129 125 0.76      
3 E 344 333 93.98      
3 E 344 333 93.98      
4 E 90 87 0.02      
4 E 90 87 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 664.7 cm-1
Scaled (by 0.9684) Zero Point Vibrational Energy (zpe) 643.7 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 B3LYP/CEP-31G
ABC
0.02883 0.02883 0.01519

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-31G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 0.000 0.000 0.915
Br2 0.000 2.165 -0.131
Br3 1.875 -1.082 -0.131
Br4 -1.875 -1.082 -0.131

Atom - Atom Distances (Å)
  P1 Br2 Br3 Br4
P12.40432.40432.4043
Br22.40433.74953.7495
Br32.40433.74953.7495
Br42.40433.74953.7495

picture of Phosphorus tribromide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 P1 Br3 102.477 Br2 P1 Br4 102.477
Br3 P1 Br4 102.477
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 P 0.226      
2 Br -0.075      
3 Br -0.075      
4 Br -0.075      


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 1.130 1.130
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -60.468 0.000 0.000
y 0.000 -60.468 0.000
z 0.000 0.000 -57.497
Traceless
 xyz
x -1.486 0.000 0.000
y 0.000 -1.486 0.000
z 0.000 0.000 2.971
Polar
3z2-r25.942
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 14.178 0.000 0.000
y 0.000 14.178 0.000
z 0.000 0.000 5.590


<r2> (average value of r2) Å2
<r2> 140.107
(<r2>)1/2 11.837