Synthesis and characterization of high-nuclearity osmium–rhodium mixed-metal carbonyl clusters; molecular and crystal structures of [Os12Rh9(CO)44(μ3-Cl)]·2CH2Cl2 and [Os4Rh3(μ3-H)(CO)14(μ3-CO)(η4-C7H8)2

Abstract

The anionic triosmium cluster [N(PPh3)2][Os3(µ-H)(CO)11] reacts with [Rh(nbd)Cl)2 (nbd = norbornadiene) in the presence of AgPF6 to give two new high-nuclearity osmium–rhodium clusters [Os12Rh9(CO)44(µ3-Cl)] 1 and [Os4Rh3(µ3-H)(CO)14(µ3-CO)(η4-C7H8)2] 2 in moderate yields.