Carbonylmetall-Komplexe des Arsinoschwefeldiimid-Achtrings tBuAs(NSN)2AstBu

Article abstract of DOI:10.1016/0022-328X(88)87003-7

The eight-membered heterocycle tBuAs(NSN)2AstBu (4), which possesses a boat-like structure, can be incorporated into carbonylmetal complexes either as a monodentate or as a bidentate chelating ligand.The metal fragment is coordinated to the top of the boat-shaped ring system.The reactions of 4 with 16-electron complex fragments MLn(THF) (generated photolytically in THF solution) lead to 1:1 adducts of the type MLn(tBuAs(NSN)2AstBu) where MLn = Cr(CO)5 (5), W(CO)5 (6), CpMn(CO)2 (7) and CpRe(CO)2 (8); attempts to attach a second complex fragment MLn to form a 2:1 adduct were unsuccesful.Chelate complexes of the type M(CO)4(tBuAs(NSN)2AstBu) (M = Cr (10); Mo (11), W (12)) can be obtained from the reactions of 4 with the norbornadiene compounds M(CO)4 (nor-C7H8), while Ni(CO)2(tBuAs(NSN)2AstBu) (13) is accessible starting from Ni(CO)4.The complexes 5 and 6 are thermally and photochemically decarbonylated in solution to give the chelate complexes 10 and 12, respectively.The IR, NMR and mass spectra of the new complexes are described.