Synthesis, crystal structure and solution fluxionality of heterometallic hydride clusters [WRu3L(CO)11(μ-H)2-(AuPPh3)] (L = C5H5 or C5Me5)
Journal
Journal of the Chemical Society, Dalton Transactions
Journal Issue
12
Pages
1823-1828
Date Issued
1993
Author(s)
Abstract
Two heterometallic compounds [WRu3L(CO)11(μ-H)2(AuPPh3)] (L = C5H5 1 or C5Me5 2) were prepared by hydrogenation of [WRu3L(CO)12(AuPPh3)] in refluxing tetrahydrofuran solution. The C5H5 derivative possesses a tetrahedral Ru3W core in which the AuPPh3 unit bridges a Ru-Ru edge, one hydride caps a nearby WRu2 face and the second spans a Ru-Ru edge, whereas the corresponding C5Me5 derivative adopts a related but distinct molecular geometry in the solid state, in which both hydride ligands span the equivalent Ru-W edges and the AuPPh3 unit is linked to the Ru atoms supporting the hydrides. The dynamic processes in solution were established for these two derivatives. Crystal data for 1: monoclinic, space group P21/c; a = 9.031(2), b = 25.086(4), c = 16.238(3) Å, β = 95.75(2)°, Z = 4; final R = 0.036, R′ = 0.032 for 4391 reflections with I > 2σ(I). Crystal data for 2: space group Pna21; a = 20.389(3), b = 16.226(3), c = 26.074(4) Å, Z = 8; final R = 0.040, R′ = 0.036 for 4556 reflections with l > 2σ(I).
Type
journal article