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All results from a given calculation for PBr3 (Phosphorus tribromide)

using model chemistry: CBS-Q

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at CBS-Q
 hartrees
Energy at 0K-8059.600321
Energy at 298.15K-8059.593612
HF Energy-8050.701780
Nuclear repulsion energy945.640431
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 CBS-Q
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 428 428 24.58      
2 A1 182 182 0.61      
3 E 454 454 109.20      
3 E 454 454 109.20      
4 E 124 124 0.09      
4 E 124 124 0.09      

Unscaled Zero Point Vibrational Energy (zpe) 883.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 883.4 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 CBS-Q
ABC
0.03431 0.03431 0.01813

See section I.F.4 to change rotational constant units
Geometric Data calculated at CBS-Q

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 0.000 0.000 0.855
Br2 0.000 1.976 -0.122
Br3 1.711 -0.988 -0.122
Br4 -1.711 -0.988 -0.122

Atom - Atom Distances (Å)
  P1 Br2 Br3 Br4
P12.20412.20412.2041
Br22.20413.42173.4217
Br32.20413.42173.4217
Br42.20413.42173.4217

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 101.827 Br2 P1 Br4 101.827
Br3 P1 Br4 101.827
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability