Preparation and reactions of half-sandwich rhenium nitrosyl complexes containing a tethered amino ligand

Abstract The aminorhenium nitrosyl complex [ η 5 : η 1 -C 5 H 4 CH 2 CH 2 N(CH 3 ) 2 Re(NO)(CO)] + BF 4 − ( 5a ), in which the ligating amino group was connected to the cyclopentadienyl ring, was prepared by reacting the η 5 -C 5 H 4 CH 2 CH 2 N(CH 3 ) 2 Re(NO)(CO)Br ( 4 ) with AgBF 4 . Reaction of 5a with alkylmetal reagents provided the acyl complex η 5 : η 1 -C 5 H 4 CH 2 CH 2 N(CH 3 ) 2 Re(NO)COR ( 8 ) (R  n-butyl, methyl, ethyl, isopropyl, benzyl). Solid state structures of 5b (X −  BPh 4 − ) and the acetyl complex 8b were characterized by single-crystal X-ray analyses.