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 PPO (Phosphorus oxide phosphide)

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 C*V 1Σ
Energy calculated at BLYP/3-21G*
 hartrees
Energy at 0K-754.167455
Energy at 298.15K-754.168450
HF Energy-754.167455
Nuclear repulsion energy122.650247
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 Σ 1228 1220 58.81      
2 Σ 642 637 0.76      
3 Π 181 180 1.82      
3 Π 181 180 1.82      

Unscaled Zero Point Vibrational Energy (zpe) 1115.8 cm-1
Scaled (by 0.9935) Zero Point Vibrational Energy (zpe) 1108.5 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*
B
0.12545

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 0.000 0.000 1.477
P2 0.000 0.000 -0.436
O3 0.000 0.000 -1.952

Atom - Atom Distances (Å)
  P1 P2 O3
P11.91253.4290
P21.91251.5165
O33.42901.5165

picture of Phosphorus oxide phosphide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
P1 P2 O3 180.000
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 P -0.109      
2 P 0.444      
3 O -0.335      


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 0.692 0.692
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.433 0.000 0.000
y 0.000 -30.433 0.000
z 0.000 0.000 -33.606
Traceless
 xyz
x 1.586 0.000 0.000
y 0.000 1.586 0.000
z 0.000 0.000 -3.172
Polar
3z2-r2-6.345
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 3.269 0.000 0.000
y 0.000 3.269 0.000
z 0.000 0.000 10.641


<r2> (average value of r2) Å2
<r2> 85.717
(<r2>)1/2 9.258