Polyphosphines, alkylation

The solutions of alkali pentaphospholides MP5 are gold-orange to red in color and are extremely sensitive to oxidation. The pentaphospholide ion P5 reacts with alkyl halides RBr and RI. The alkyl pentaphospholes RP5 which are to be assumed as the primary products are non-aromatic and unstable, however, and rearrange to alkyl polyphosphines such as R3P7 and R3P9 <88AG288>. The trimethylsilyl pentaphosphole is known as a complex ligand (see Section 4.22.12.1.2). 

Substituting a hydroxide group of the phosphonic acid by an alkyl group or an aryl group, respectively, leads to the compound class of polyphosphinic acids ... 

Of the 33 papers presented at the symposium 32 are included in this volume. They are of two general types. One type discusses inorganic compounds exhibiting a specific property, most frequently electrical or photochemical. The second type reviews recent developments in the synthetic chemistry of a class of inorganic compounds— most often transition metal or lanthanide complexes— which are of potential interest to persons looking for new systems with unusual properties. Classes of compounds covered by this second type include metal alkyls, metal alk-oxides, metal alkylamides, metal chelates, and metal clusters as well as metal complexes with polyboranes, polyphosphines, macrocyclic derivatives, di- and triketones, and polypyrazolylborates as ligands. 

Toulhoat C, Vidal M, Vincens M (1993) Polyoxydes de polyphosphines bicycliques alkyles sur le phosphore. Phosphorus Sulfur Silicon 78 119-132... 

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