Abstract
Different coordination modes of a PGeP chloridogermyl ligand (Ge,P-chelating and P,Ge,P-tripodal) and a PGeP germylene ligand (P,Ge,P-bridging and Ge,P-chelating) have been identified in coordination compounds resulting from reactions of the PGeP pincer-type diphosphane-germylene Ge(NCH2PtBu2)2C6H4 (1) with iridium(I), manganese(0), and ruthenium(II) complex reagents. Germylene 1 reacted with [Ir2(μ-Cl)2(η4-cod)2] (cod = 1,5-cyclooctadiene) to give [Ir{κ2Ge,P-GeCl(NCH2PtBu2)2C6H4}(η4-cod)] (2), which contains a Ge,P-chelating PGeP chloridogermyl ligand and an uncoordinated phosphane group that weakly interacts with the Ge atom. Carbon monoxide readily displaced the cod ligand of 2 to give the dicarbonyl derivative [Ir{κ3P,Ge,P-GeCl(NCH2PtBu2)2C6H4}(CO)2] (3), in which the PGeP chloridogermyl ligand displays a P,Ge,P-tripodal coordination mode. A bridging germylene moiety has been identified in the binuclear derivative [Mn2{μ-κ3P,Ge,P-Ge(NCH2PtBu2)2C6H4}(CO)8] (4), which resulted from the treatment of [Mn2...
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