Magnesium compounds with phosphorus ligands

O-Apical stereoisomers of pentacoordinated phosphoranes can be obtained by different routes, including the Kawashima s synthesis of the pentacoordinated phosphorus compound bearing a pentacoordinate silicon atom, both possessing Martin ligands in the structure or by the reaetion of 8-chloro-2-cyclohexyl-4-phenylbenzo[e]-1,2-oxaphosphinine-2-oxide with tetramethylenebis(magnesium bromide) as reported by Konovalov et al ... 

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