Metallorganische Lewis-Säuren: XXXVII. Kationische Pentacarbonyl(phosphan)rhenium-komplexe unde deren reaktionen mit Nucleophilen

The reactions of pentacarbonyletrafluoroboratorhenium, (OC)5ReFBF3, with PH3, PPh3 PPH2H, and chlorphosphanes lead to cationic complexes [(OC)5RePR3]+BF4− (1). Nucleophiles react with the chlorphosphane ligands of 1 to give the ionic complexes [(OC)5RePR3-nR′n]+BF4− (R′ = OH, OMe, OEt). Reacton of [(OC)5RePPh2Cl]+BF4− with OH− yields the bridged [(OC)5ReP (Ph)2-O-(Ph)2PRe(CO)5]2+2BF4−, whereas with [(OC)5RePEt2Cl]+BF4− and OH− the complex [(OC)RePEt2OH]+BF4− is formed. The azide ion is added to a cis-carbonyl ligand of [(OC)5RePPh2Cl]+BF4− to form the neutral isocyanato complex (OC)4(ClPh2P)ReNCO. The hydroxycarbonyl complexes cis-(OC)4Re(PPh2R)(COOH) are obtained from the reaction of [(OC)5RePPh2R]+BF4− (R = Ph, H) with hydroxide. The reactions of [(OC)5ReL]+ with M(CO)5− (L = PPh3, P(OMe)3, CN-tBu; M = Mn, Re) give the nonacarbonyl dimetal compounds L(OC)4Re-M(CO)5.