Metallophosphorus Compounds

Cyclo-P triple decker metallophosphorus compound made... 

Metallophosphorus compounds which contain P-metal linkages... 

The cyclic phosphazenes form various crystalline adducts with acids, metal halides, metal carbonyls, alkyl halides, tetrafluoroborates and so forth. Some of these are metallophosphorus compounds (Chapter 8.20). Typical of these are... 

Metallophosphorus compounds may be divided into two broad classes (1) those which contain phosphorus (P) and metal atoms (M) only (2) those which contain phosphorus, metal and at least one other kind of atom E, where E is most commonly C, bnt can also be B, N, O, S or almost any other non-metal (p-block) atom. Most compounds in this latter class contain at least one E-P-M bridge. Members of class (1) (Sections 8.1 through 8.7) are usually known as metal phosphides, and most of those belonging to class (2) (Sections 8.8 through 8.20) as metallophosphorus complexes. 

Metallophosphites in covalent form (8.29) provide other examples of 3-coordinated P compounds, although they are devoid of M-P linkages and are not strictly metallophosphorus compounds (Chapter 6.8). 

Of greater interest to the phosphorus chemist are the stable metallophosphorus compounds containing unusual arrangements of multiply-bonded P atoms. During the last two decades it has been found that donor-type P Metal linkages can be formed by cyclic and acyclic P units which involve various types of coordination. 

---