Synthesis and reactions of new oxorhenium(V) complexes with Re–halogen bonds.: X-ray crystal structure of [(3-(benzyl)azapentane-1,5-dithiolato)iodo]-oxorhenium(V)

Abstract Treatment of [ReO(SN(R)S)(SMe)] (HSN(R)SH=HS–CH 2 CH 2 –N(R)–CH 2 CH 2 –SH, R= n -propyl 4a , benzyl 4b ) with an excess of CH 3 I at room temperature gave the–SCH 3 displaced products [ReO(SN(R)S)I] 5a , b in about 80% yield. [(3-(Benzyl)azapentane-1,5-dithiolato)iodo]oxorhenium(V) 5b was characterized by single-crystal structure analysis revealing a distorted trigonal bipyramidal geometry with the oxygen and the sulfur atoms forming the equatorial plane. Compounds 5 allow clean transformation to new SNS/thiolato mixed-ligand complexes as shown herein by a sample reaction with 1-β- d -thiogalactose to give 6a .