Abstract The first γ-trimethylstannyl sulfimide, Me 3 Sn (CH 2) 3 S (= NSO 2 Ar) C 5 H 11-n, was synthesized by oxidative imination of Me 3 Sn (CH 2) 3 SC 5 H 11-n with ArSO 2 (Na) Cl (Ar= C 6 H 4 Cl-4). Oxidation of γ-trimethylstannyl sulfimide by an alkaline solution of H 2 O 2