Facile rhenium (IV)-mediated coupling of acetonitrile and oximes

摘要

Addition of oximes RR'C = NOH [R/R' = Me/Me, C_4H_8, C_5H_(10), C_9H_(18), C_9H_(16) or Me/C(Me)NOH] to the acetonitrile ligands in cis-[ReCl_4(MeCN)_2] proceeded smoothly at room temperature within a few minutes to give cis-[ReCl_4{NH=C(Me)ON=CRR'}_2] in almost quantitative yield. All complexes were characterized by elemental analysis, IR spectroscopy and FAB mass spectrometry. Structure determination, performed for cis-[ReCl_4{NH=C(Me)ON=C(C_5H_(10))}_2] centre dot MeCN and cis-[ReCl_4{NH=C(Me)ON=C(C_9H_(18)}_2], show that the cis geometry of the starting complex is conserved in the products.