Abstract By use of Re(CO)5FBF3 the complexes with a single unsupported halide or pseudohalide bridge [Cp(OC)2Fe-X-Re(CO)5]+ BF4- (X=Cl, I, PPh2), (OC)5M-X-Re(CO)5 (M=Cr, W; X=Br, I, CN, NCS, SH), (OC)5W-N≡C-C[-C≡N-Re(CO)5]2+ BF4-, Cp(OC)(NC)Fe-C≡N-Re(CO)5, and [(OC)5Re-N3-Re(CO)5]+ BF4- have been synthesized.