Synthesis and characterization of some novel triphenylarsenic(V) derivatives of monofunctional bidentate 2,2‐disubstituted benzothiazoline ligands

A series of triphenylarsenic(V) derivatives Ph 3 As(OPr i )[SC 6 H 4 N:C(R)CH 2 C(O)R′] have been synthesized by the reactions of triphenylarsenic(V)‐ isoproproxide, Ph 3 As(OPr i ) 2 with the corresponding 2,2‐disubstituted benzothiazolines of the type HNC₆ H₄ S̄C(R)CH₂C(O)R' (where R = CH 3 , R′ = CH 3 ( 1 ); R = CH 3 , R′ = C 6 H 5 ( 2 ); R = CH 3 , R′ = 4‐CH 3 C 6 H 4 ( 3 ); R = CH 3 , R′ = 4‐ClC 6 H 4 ( 4 ); and R = CF 3 , R′ = C 6 H 5 ( 5 )) in equimolar ratio in refluxing benzene solution. Molecular weight measurements of these complexes show their monomeric nature in solution. Characterization of these compounds using elemental analyses, molecular weight measurements, and spectral studies (IR as well as NMR ( 1 H and 13 C)) shows the monofunctional bidentate nature of the ligands and a hexacoordination around the central arsenic atom in these organoarsenic(V) derivatives.