The synthesis and characterization of rhenium nitrosyl complexes. The X-ray crystal structures of [ReBr 2 (NO)(NCMe) 3 ], [Re(NO)(N 5 )](BPh 4 ) 2 ] and [ReBr 2 (NO)(NCMe){py-CH 2 -NH∼CH 2 CH 2 -N(CH 2 -py) 2 }]

Reactions of low oxidation state rhenium–nitrosyl complexes with polyamine ligands have been examined. Rhenium(II)–nitrosyl complexes gave an array of unstable products that were difficult to isolate cleanly. The rhenium(I)–nitrosyl complex [ReBr2(NO)(NCMe)3] gave multiple products which were more easily isolated.