The synthesis and characterisation of some indenylophane clusters [M4H(CO)(9)(L-H)] (M = Ru or Os)

摘要

In a study concerning the reactivity of the [M-3(CO)(12)] (M=Ru or Os) clusters towards the [2.2]parabenzoindenophane (L-1) and anti-[2.2]indenophane (L-2) ligands, the molecular structures of three new compounds [Ru4H(CO)(9)(L-1-H)] 1, [Os4H(CO)(9)(L-1-H)] 2 and [Ru4H(CO)(9)(L-2-H)] 3 were established by single crystal X-ray diffraction analyses. In all cases it was observed that the ligand had undergone C-H bond activation with the resultant indenyl and hydride fragments retained upon the metal cluster in the facial mu(3)-eta(5):eta(2):eta(2) and edge-bridging mu modes, respectively. Surprisingly, despite possessing two indene faces for cluster association, L-2 also appears only to be able to utilise one of them. [References: 19]