Halides of Phosphorus, Arsenic

Cryoscopic and ebullioscopic measurements indicate that the halides of phosphorus, arsenic, antimony, titanium and tin readily undergo reciprocal interaction with interchange of halogen atoms and that mixed halides can be formed11 (see p. 103). Melting and freezing point curves are, however, generally of the eutectic or mixed crystal types, without... 

From the dipole moments of the halides of phosphorus, arsenic and antimony it is possible to calculate the contributions of the ionic states in these... 

This article is concerned mainly with the simple halides of phosphorus, arsenic, antimony, and bismuth compounds that also contain other elements or groups will be considered only to a limited extent. Nitrogen compounds show special features associated with the absence in nitrogen of d electrons for bonding, and are not easily discussed together with compounds of the heavier elements they will therefore be omitted. Bismuth has metallic properties that differentiate its compounds from those of elements in the middle of the group the break in properties between the compounds of antimony and bismuth is not, however, so marked as that between compounds of nitrogen and phosphorus. 

The first cyclopentadienyl n complexes of phosphorus, arsenic, and antimony have been characterized only recently. The salt-like species LXXXV-LXXXVII containing a cationic n complex are prepared via halide ion abstraction from pentamethylcyclopentadienyl element halides according to Eq. (47) (248-250). 

The solvent properties of acetic anhydride have been reviewed in considerable detail i. Alkali acetates, acetyl halides, alkali iodides, halides of phosphorus(III), arsenic(III), antimony(V) and other acceptor compounds as well as many other covalent compounds are usually soluble in acetic anhydride. 

In addition to sulfoniujn ylides of platinum(II),435 platinum(II) halides of some phenacylides of nitrogen (p-MeC5H4NCHC(0)Ph), phosphorus and arsenic have been prepared.438 The configurations have been elucidated by IR and LH NMR spectroscopy, and it has been found that 2/(195ptHmethine) increases with increasing basicity of the ylide N > As > S > P. 

Of all the reactions studied, only the synthesis of nitrogen oxides and acetylene in arcs or plasma torches and that of ozone in glow and corona discharges are of major importance. In addition, a few small-scale preparations of inorganic compounds have been developed, e.g. synthesis of hydrazine and of hydrides and halides of silicon, germanium, tin, lead, phosphorus or arsenic 3> ... 

This chapter deals with the solid-state structures of the element(III) halides and halogenoanions of arsenic, antimony, and bismuth with brief mention of some compounds of phosphorus where relevant. A... 

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