Rhenium(III) and Rhenium(V) Complexes That Contain the (C6F5NCH2CH2)3N Ligand

The reaction between [Et 4 N] 2 [ReOCl 5 ] and (C 6 F 5 NHCH 2 CH 2 ) 3 N in THF at room temperature in the presence of NEt 3 yielded air-stable emerald green diamagnetic [(C 6 F 5 NCH 2 CH 2 ) 2 NCH 2 CH 2 NHC 6 F 5 ]Re(O)Cl ( 1 ). The reaction between 1 and Ta(CH- t -Bu)(THF) 2 Br 3 gave paramagnetic {[(C 6 F 5 NCH 2 CH 2 ) 3 N]ReBr}Br ( 2 ). Reduction of 2 by methyllithium under dinitrogen gave diamagnetic [(C 6 F 5 NCH 2 CH 2 ) 3 N]Re(N 2 ), under carbon monoxide gave [(C 6 F 5 NCH 2 CH 2 ) 3 N]Re(CO), under dihydrogen gave [(C 6 F 5 NCH 2 CH 2 ) 3 N]ReH 2, and under ethylene gave [(C 6 F 5 NCH 2 CH 2 ) 3 N]Re(C 2 H 4 ).