Hydrogen phosphides

Some phosphides, such as titanium phosphide [12037-65-9] TiP, can be prepared bypassing phosphine over the metal or its haUde. Reaction of phosphine with heavy metal salt solutions often yields phosphines that may contain unsubstituted hydrogens. Phosphides may also be prepared by reducing phosphoms-containing salts with hydrogen, carbon, etc, at high temperatures, the main example of which is the by-product formation of ferrophosphoms in the electric furnace process for elemental phosphoms. Phosphoms-rich phosphides such as vanadium diphosphide [12037-77-3] may be converted to lower phosphides, eg, vanadium phosphide [12066-53-4] by thermal treatment. 

Certain phosphides, hydrides and silanes (e.g. hydrogen phosphide, silane). 

Heptachlor Hydrogen cyanide Hydrogen phosphide Imazalil... 

Though it has been stated that phosphine is not spontaneously inflammable, with quite small admixtures of liquid hydrogen phosphide it immediately bursts into flame on coming into contact with air. 

Phosphine produced by the reaction of water on calcium phosphide always contains a quantity of the liquid hydrogen phosphide sufficient to make the gas spontaneously inflammable. Use of this property is made in the Holmes Light used at sea as a distress signal, and also as a marker at torpedo practice. 

Synonyms Hydrogen phosphide phosphoret-ted hydrogen phosphorus trihydride... 

Formula PH3 MW 34.00 molecular geometry trigonal pyramidal. Synonyms phosphorus trdiydride hydrogen phosphide... 

Perform all experiments with white and red phosphorus, and also with hydrogen phosphide in a fume cupboard. White phosphorus is poisonous and readily ignites. Work with it requires special care. Handle white phosphorus only with pincers. Carry phosphorus to your workplace only in a porcelain bowl or in a mortar with water. 

What compounds of phosphorus with hydrogen are known Compare the properties of phosphine (hydrogen phosphide) and ammonia. Write the coordination formulas of the phosphonium ion and hypo-phosphorous acid. 

Some other hydrogen phosphides have been reported. Thus, T. A. Commaille supposed hydrogen triphosphide, P3H, to be formed by the action of aq. ammonia of sp. gr. 0-972. 

The most difficult impurity to eliminate is hydrogen, which is nearly always formed simultaneously with the phosphine. G. Ter-Gazarian found the most effective method of purifying the gas from traces of other hydrogen phosphides, and from hydrogen is repeated liquefaction and fractional distillation of the liquid. F. M. G. Johnson recommended alumina, dehydrated at a low temp., as a desiccating agent for the gas. 

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