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 P2H4 (Diphosphine)

using model chemistry: B3LYP/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at B3LYP/6-31G*
 hartrees
Energy at 0K-685.095070
Energy at 298.15K-685.100335
Nuclear repulsion energy87.658515
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/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 2413 2317 47.29      
2 A 2404 2309 94.47      
3 A 1158 1112 13.11      
4 A 902 866 0.10      
5 A 661 634 6.56      
6 A 424 407 0.60      
7 A 201 193 3.87      
8 B 2424 2328 155.43      
9 B 2388 2294 26.81      
10 B 1145 1100 26.73      
11 B 830 797 54.20      
12 B 645 620 12.61      

Unscaled Zero Point Vibrational Energy (zpe) 7797.0 cm-1
Scaled (by 0.9603) Zero Point Vibrational Energy (zpe) 7487.5 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 B3LYP/6-31G*
ABC
2.17022 0.18882 0.18835

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 0.000 1.125 -0.086
P2 0.000 -1.125 -0.086
H3 -0.191 1.375 1.303
H4 1.415 1.251 -0.007
H5 0.191 -1.375 1.303
H6 -1.415 -1.251 -0.007

Atom - Atom Distances (Å)
  P1 P2 H3 H4 H5 H6
P12.25041.42461.42292.86682.7667
P22.25042.86682.76671.42461.4229
H31.42462.86682.07632.77663.1798
H41.42292.76672.07633.17983.7775
H52.86681.42462.77663.17982.0763
H62.76671.42293.17983.77752.0763

picture of Diphosphine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
P1 P2 H5 100.104 P1 P2 H6 95.069
P2 P1 H3 100.104 P2 P1 H4 95.069
H3 P1 H4 93.630 H5 P2 H6 93.630
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 P -0.065 -0.189 0.880 -0.218
2 P -0.065 -0.189 0.880 -0.211
3 H 0.031 0.081 -0.441 0.090
4 H 0.034 0.108 -0.440 0.128
5 H 0.031 0.081 -0.441 0.088
6 H 0.034 0.108 -0.440 0.123


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 1.399 1.399
CHELPG 0.000 0.000 1.166 1.166
AIM 0.000 0.000 2.977 2.977
ESP 0.031 0.001 1.288 1.288


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.298 2.131 0.000
y 2.131 -30.659 0.000
z 0.000 0.000 -29.472
Traceless
 xyz
x 1.767 2.131 0.000
y 2.131 -1.774 0.000
z 0.000 0.000 0.007
Polar
3z2-r20.014
x2-y22.361
xy2.131
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.588 0.325 0.000
y 0.325 8.883 0.000
z 0.000 0.000 5.313


<r2> (average value of r2) Å2
<r2> 71.001
(<r2>)1/2 8.426