Abstract

The crystal structures of (PPh₃)HgRe₂ (μ-acPh)(μ-PCy₂)(CO)₆1 and (PPh₃)HgRe₂(μ-PCy₂) Cl(CO)₇2 (Cy = cyclohexyl) exhibit both a HgRe₂ triangular metal core with an exocyclic PPh₃ ligand attached to Hg. 1 crystallizes in space group P[unk] with a = 9.703(2) Å, b = 10.484(3) Å, c = 21.526(6) Å, α = 86.46(2)°, β = 84.26(2)°, γ = 81.65(2)°, V = 2153(1) ų. The metal – metal bond lengths are Re – Re 3.060(1) Å, Hg – Re 2.757(1) Å and Hg – Re 2.765(1) Å. Compound 2 crystallizes in space group P2₁/n with a = 15.134(4) Å, b = 9.623(4) Å, c = 27.273(9) Å, β = 92.42(2)°, V = 3967(2) ų. Bond lengths are Re – Re 3.254(1) Å, Hg – Re 2.770(1) Å and Hg – Re 2.786(1) Å.