Cyclic Anions of Phosphorus, Arsenic, Antimony and Bismuth

2 CYCLIC ANIONS OF PHOSPHORUS, ARSENIC, ANTIMONY AND BISMUTH 

There are three common allotropes of phosphorus. White phosphorus consists of tetrahedral P4 molecules, whereas red phosphorus may be described as interlocking chains of phosphorus atoms linked by P P bonds. The most 

The most widespread complexes of cyclic pnictogen anions are those containing the planar six 71-electron ligand cyclo-Ps (isovalent with [CsHs] ). The potassium salt of this anion is obtained in solution by the reaction of red phosphorus with KPH2 in boiling DMF this reagent can be used for the direct synthesis of tj -Ps complexes of metal carbonyls [eqns (11.2a) (M = Cr, Mo, W) and (11.2b)]. An intriguing example of 

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