Organometallic Lewis Acids, Part LVIIII [1]. Directed Synthesis of Dinuclear Metal Carbonyl Complexes of Rhenium, Iron, Chromium, and Tungsten with a Single Unsupported Halide or Pseudohalide Bridge (Cl - , Br - , I - , CN - , C(CN) 3 - , NCS - , PPh 2 - , SH - ) by Use of Re(CO) 5 FBF 3

By use of Re(CO) 5 FBF 3 the complexes with a single unsupported halide or pseudohalide bridge [Cp(OC) 2 Fe-X-Re(CO) 5 ] + BF 4 - (X=Cl, I, PPh 2 ), (OC) 5 M-X-Re(CO) 5 (M=Cr, W; X=Br, I, CN, NCS, SH), (OC)5W-N≡C-C[-C≡N-Re(CO) 5 ] 2 + BF 4 - , Cp(OC)(NC)Fe-C≡N-Re(CO) 5 , and [(OC) 5 Re-N 3 -Re(CO) 5 ] + BF 4 - have been synthesized.