N, N-Diethyl-N′-4-nitrobenzoylselenourea (HLSe) reacts with the mono-and dinuclear phosphine gold (I) chloro complexes [AuCl (PR3)](R= Ph, o-tol, Et) and [Au2Cl2 (μ-PP)](PP= dppm, dppe, dppp, dppb, dppf) in the presence of base to give gold (I) phosphine selenoureato complexes [Au (LSe)(PR3)][R= Ph (1), o-tol (2), Et (3)],[Au2 (LSe) 2 (μ- PP)][PP= dppm (4), dppe (5), dppp (6), dppb (7), dppf (8)] in excellent yields. The ...