Phosphorus-aluminum bonds reactions with

The ability of phosphorus-carbon-aluminum cage compounds to function as ligands in transition metal complexes will be briefly illustrated by the example of 82 (R = i-Bu) on reaction with diiron nonacarbonyl. Coordination of the Fe(CO)4 fragment occurs exclusively at the phosphorus atom of the double bond which serves as a two-electron donor (- 83,100 %) (Scheme 6-21) [65]. 

This problem has been partially overcome by elimination of the phosphorus-oxygen bonds, as, for example, in the poly(phosphinoisocyanates), which have the structure shown in 6.47.42 It is also possible to form poly(metal phosphinates) with repeat unit -M(0PR20)2- by allowing a metal alkoxide to react with a phosphinic acid.43 Typical metal atoms are aluminum, cobalt, chromium, nickel, titanium, and zinc.43 Polymeric phosphine oxides can be prepared by the reactions... 

In many ways the phosphates provide the richest field for CBC s (chemically bonded ceramics) because of the P—O bond strengths and the coordination demands of pentavalent phosphorus. Among silicates, room temperature hydration reactions seem to be possible only with Ca-compounds the magnesium and aluminum anhydrous silicates phases simply do not react. This book documents for the reader the wide application of these separate chemistries as true chemically bonded ceramics. 

Reduction of triazolinones with phosphorus sulhde has been one of the early routes to triazoles (o5JCS625). Milder reactions may differentiate between conjugation of the ring double bond with C=0 (139) or the lack of it (140) as in Scheme 48 (71bsf3296). The formation of triazole in the reduction of the triazolinone (140) with lithium aluminum hydride (7ibsf3296) is explicable through the formation of a hydroxytriazoline intermediate. 

---