Organometallic Lewis Acids, Part LIX [1] Pentacarbonylrhenium Complexes with Phosphorus Tricyanide and Dicyanophosphide

The addition of Re(CO) 5 + [as Re(CO) 5 FBF 3 ] to P(CN) 3 and to P(CN) 2 – affords the complexes [Re(CO) 5 ] 3 P(CN) 3 (BF 4 ) 3 and Re(CO) 5 P(CN) 2 , respectively. The spectroscopic data indicate that Re(CO) 5 + is coordinated to each of the three cyano groups of P(CN) 3 to give {P[C≡N‐Re(CO) 5 ] 3 }[BF 4 ] 3 , whereas the pseudohalide P(CN) 2 – is bonded to the rhenium cation through the phosphorus atom.