Cyclic arsines oxidation

Direct, stereospecific introduction of angular allyl groups into fused cyclic a,/ -enones by means of titanium tetradiloride has been reported Reactions, including C-alkylation, have been effected via metalation of arsine oxides Syntheses with organometallic reagents may be facilitated by transmetalation, e.g. from zirconium to aluminum... 

Ligands such as phosphines (PRj) and arsines (AsRs) (R = alkyl, aryl, halogen, etc.) form complexes with a variety of metals in various oxidation states. Vibrational spectroscopy has been used extensively to determine the structures of these compounds and to discuss the nature of the metal-phosphorus (M-P) bonding. Verkade reviewed spectroscopic studies of M-P bonding with emphasis on cyclic phosphine ligands. 

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