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 HCP (Phosphaethyne)

using model chemistry: PBEPBE/6-31G(2df,p)

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 PBEPBE/6-31G(2df,p)
 hartrees
Energy at 0K-379.774237
Energy at 298.15K-379.774701
Nuclear repulsion energy36.696599
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/6-31G(2df,p)
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 3303 3269 12.08      
2 Σ 1301 1287 0.64      
3 Π 721 713 61.84      
3 Π 721 713 61.84      

Unscaled Zero Point Vibrational Energy (zpe) 3022.2 cm-1
Scaled (by 0.9897) Zero Point Vibrational Energy (zpe) 2991.1 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/6-31G(2df,p)
B
0.66070

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-31G(2df,p)

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.007
H2 0.000 0.000 -2.088
P3 0.000 0.000 0.542

Atom - Atom Distances (Å)
  C1 H2 P3
C11.08101.5492
H21.08102.6302
P31.54922.6302

picture of Phosphaethyne state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 P3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.119      
2 H 0.190      
3 P -0.071      


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 -0.708 0.708
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.397 0.000 0.000
y 0.000 -19.397 0.000
z 0.000 0.000 -15.234
Traceless
 xyz
x -2.082 0.000 0.000
y 0.000 -2.082 0.000
z 0.000 0.000 4.164
Polar
3z2-r28.328
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 3.148 0.000 0.000
y 0.000 3.148 0.000
z 0.000 0.000 6.345


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