Spirocyclic phosphazene complexes of arsenic(III): Synthesis and characterization

A new acyclic phosphazene ligand, [HN(PPh2NPh)(2)] (A) has been synthesized and characterized. Spirocyclic phosphazene-glycolate complexes of arsenic(III) with ligand (A) and [HN(PPh2NSiMe3)(2)] (B), having the general formula [N(PPh2NPh)(2)AsOGO] and [N(PPh2NSiMe3)(2)AsOGO] (where G = -CH2CH2-, -CHMeCH2-, -CHMeCH2CMe2-, -CH2CH2CH2-, or -CMe2CMe2-) also have been synthesized by their reaction with chloro dioxarsolanes and -arsenanes in anhydrous medium. These moisture sensitive complexes are characterized by elemental analysis, IR, NMR (H-1, C-13, and P-31), and mass spectral data which have been discussed in relation to plausible structure for these arsenic(III) derivatives.