In chemistry, a phosphide is a compound of phosphorus with a less electronegative element or elements. Binary compounds are formed with the majority of less electronegative elements with the exception of Hg, Pb, Sb, Bi, Te, Po. Typically there are a range of stoichiometries with each element; for example, potassium has nine phosphides (K3P, K4P3, K5P4, KP, K4P6 K3P7, K3P11, KP10.3, KP15) and nickel has eight (Ni3P, Ni5P2, Ni12P5, NiP2, Ni5P4, NiP, NiP2, NiP3).
Classification of these compounds is difficult. On structural and reactivity grounds they can be broadly classified as:
- principally ionic with P−
3 ions. Examples are the group 1 (e.g. Na3P) and group 2 (e.g. Ca3P2) metal phosphides.
- polyphosphides with, for example, dumbbell P4−
2 ions; cluster P3−
11 ions; polymeric chain anions (e.g. the helical (P−)n ion) and complex sheet or 3-D anions.
- compounds with individual P atoms in a metal lattice that can be semiconducting (e.g. GaP) through to metallic (e.g. TaP) in terms of electrical conductance.
Two polyphosphide ions, P40−
3 found in K4P3 and P5−
4 found in K5P4, are radical anions with an odd number of valence electrons making both compounds paramagnetic.
Other articles related to "phosphide":
... Alexandre Baudrimont prepared sodium phosphide by reacting molten sodium with phosphorus pentachloride ... phosphorus is reduced by sodium-potassium alloy to give the phosphide salt ... The conversion of white phosphorus to the phosphide has been well studied ...
... Calciferols Cholecalciferol Ergocalciferol Inorganic compounds Aluminium phosphide Arsenic Barium carbonate Calcium phosphide Cyanide Thallium sulfate Zinc ...
... Sodium phosphide, Na3P, is a black, ionic salt containing the alkali metal sodium and the phosphide anion ... Na3P is a source of the highly reactive phosphide anion ...
... Ergocalciferol Inorganic compounds Aluminium phosphide Arsenic Barium carbonate Calcium phosphide Cyanide Thallium sulfate Zinc phosphide Organochlorine Chloralose ...
... As a rodenticide, aluminium phosphide pellets are provided as a mixture with food for consumption by the rodents ... The acid in the digestive system of the rodent reacts with the phosphide to generate the toxic phosphine gas ... Other pesticides similar to aluminium phosphide are zinc phosphide and calcium phosphide ...