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	hartrees
Energy at 0K	-680.489190
Energy at 298.15K	-680.494707
Nuclear repulsion energy	89.263841

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A	2616	2362	53.87
2	A	2602	2349	44.99
3	A	1277	1153	17.45
4	A	1007	909	0.03
5	A	745	672	11.23
6	A	480	433	0.32
7	A	232	210	2.95
8	B	2615	2360	120.76
9	B	2597	2344	47.72
10	B	1262	1139	44.47
11	B	953	860	57.75
12	B	721	651	18.09

Atom	x (Å)	y (Å)	z (Å)
P1	0.000	1.103	-0.084
P2	0.000	-1.103	-0.084
H3	-0.222	1.360	1.275
H4	1.390	1.256	-0.016
H5	0.222	-1.360	1.275
H6	-1.390	-1.256	-0.016

	P1	P2	H3	H4	H5	H6
P1		2.2054	1.4005	1.4002	2.8217	2.7390
P2	2.2054		2.8217	2.7390	1.4005	1.4002
H3	1.4005	2.8217		2.0673	2.7567	3.1429
H4	1.4002	2.7390	2.0673		3.1429	3.7474
H5	2.8217	1.4005	2.7567	3.1429		2.0673
H6	2.7390	1.4002	3.1429	3.7474	2.0673

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
P1	P2	H5	100.603	P1	P2	H6	96.300
P2	P1	H3	100.603	P2	P1	H4	96.300
H3	P1	H4	95.146	H5	P2	H6	95.146

All results from a given calculation for P₂H₄ (Diphosphine)

using model chemistry: HF/3-21G*

States and conformations

	Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
	Home All data for one species Geometry Experimental Experimental Geometries Same bond/angle many molecules Internal Coordinates by type Bond angles Calculated Calculated geometry Rotational constant Moments of inertia Products of moments of inertia BSE Bond lengths Show me a calculated geometry Comparisons Bonds, angles Rotational Constants Products of moments of inertia Point group Bad Calculations Bad moment of inertia Tutorials and Explanations Angle formulas Vibrations Experimental Vibrational frequencies Calculated Frequencies Scale factors Reactions Entropies Ions List Ions Energy Calculated Ionization Energy Compare Ionzation energy Electron Affinity Calculated Electron affinity Compare Electron affinity Proton Affinity Calculated Proton affinity Compare Proton affinity Ionization changes point group Experimental One molecule all properties One property a few molecules Enthalpy of formation Entropy Integrated Heat Capacity Heat Capacity Rotational Constants Vibrational Frequencies Dipole moment Ionization Energy Polarizability Quadrupole Point Groups Geometry Experimental Geometries Internal Coordinates by type Bond angles Rotational Constants Point Groups Diatomic bond lengths Vibrations Vibrational frequencies Diatomic Triatomics Energy Atomization Energy Internal Rotation Electrostatics Dipole Quadrupole Polarizability Reference Data Reference states Spin Splittings Molecules with good enthalpy Enthalpy at 0 Kelvin Calculated Energy Optimized Energy Energy 298K Minimum conformation Hydrogen bonds H bond with counterpoise Reaction Reaction Energy 0K Reaction Energy 298K Internal Rotation Barriers to internal rotation Rotational barrier and dipole Rotational Barrier 2 molecules Orbital HOMO LUMO gap HOMO Orbital Energies Nuclear repulsion energy Correlation Full vs Frozen core energies Partial correlation energies Ion Calculated Ionization Energy Vertical ionization Energy Calculated Electron affinity Calculated Proton affinity Atom charge differences Excited State Singlet triplet gap Electronic state Transition state Basis Set Extrapolation BSE energy BSE Bond lengths Geometry Calculated geometry AIM bond orders One type of bond Rotation Rotational constant Products of moments of inertia Moments of inertia Inertial defects Second moments Point group State symmetry <r2> Sorted by r2 Z-matrix Bad Calculations Bad moment of inertia Bad Calculated Bond Lengths Bad point group Worst molecules Vibrations Frequencies Animated vibrations Anharmonic Zero point energy (ZPE) Scale Factors Scale factors Scale factor uncertainty Calculate a scale factor Why scale vibrations Set scaling factors Bad Calculations Bad Vib. 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Calc. vs exp. Bad Vib. HF vs MP2 Bad scale factors Low excited states Oddities NaCN Is not linear FAQ Help Units Choose Units Energy Bond length Rotational Constant Moment of Inertia Dipole and Quadrupole Polarizability Explanations Hartree cm-1 Debye Credits Just show me Show me a calculated geometry Summary Using older interface Limit Basis sets Method options List Recent molecules Choose a few Molecules Number of atoms By heavy atoms Diatomics InChI Deuterated Dimers Geometry Point group Point group count Bonds types Isodesmic reactions Bad point group Multiple conformers, states Vibrations Big anharmonicity Energy Enthalpy at 0 Kelvin Similar molecules Similar Isomers Cis/trans Tautomers Multiple conformers, states Ions, Dipoles, etc. List Ions Ionization changes point group Dipole Quadrupole Polarizability Proton Affinities Index of CCCBDB Feedback Error form Wants
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Number	Element	Mulliken	CHELPG
1	P	-0.051	-0.192
2	P	-0.051	-0.192
3	H	0.025	0.079
4	H	0.026	0.112
5	H	0.025	0.079
6	H	0.026	0.112

	x	y	z
x	5.318	0.469	0.000
y	0.469	7.952	0.000
z	0.000	0.000	4.902

<r²>	69.631
(<r²>)^1/2	8.345

All results from a given calculation for P2H4 (Diphosphine)

using model chemistry: HF/3-21G*

States and conformations

All results from a given calculation for P₂H₄ (Diphosphine)