New rhenium carbonyl cluster complexes containing bridging hydrocarbyl and bridging mercury groups

The new rheniumemercury complexes [Re-2(CO)(8)(mu-HgI)(mu-eta(1)-C6H5)](2), 2 and [Re-2(CO)(8)[mu-HCC(H)C4H9](2)(mu(4)-Hg), 3 were obtained from the reactions of Re-2(CO)(8)[mu-Au(PPh3)](mu-eta(1)-C6H5), 1 with HgI2 and of Re-2(CO)(8)[mu-HCC(H)C4H9](mu-H) with Hg(C6H5)(2), respectively. In the solid state compound 2 is dimer of Re-2(CO)(8)(mu-HgI)(mu-eta(1)-C6H5) that held together by iodide ligands that asymmetrically bridge between the two mercury atoms. Each dirhenium group is formally electronically unsaturated and contains one bridging eta(1)-C6H5 ligand. Compound 3 contains two Re-2(CO)(8)[mu-HCC(H)C4H9](2) groups held together by a quadruply bridging spiro-structured mercury atom. (C) 2015 Elsevier B.V. All rights reserved.