Abstract 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 equation image (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 ...