Halogenverbrückte Heterometallatomcluster der drei Typen Re2(CO)4L2(μ-X)2(μ-Y) (L = (C6H5)3P; X = Br,I; Y = GaRe(CO)4ax-L), Re2(CO)6L2(μ-X)(μ-GaX2) (X = I) und Re3(CO)9L3(μ-X)3(μ-Y) (X = Cl)

Halogeno-Bridged Heteronuclear Metal Atom Clusters of the Three Types Re₂(CO)₄L₂(μ-X)₂(μ-Y) (L = (C₆H₅)₃P; X = Br, I; Y = GaRe(CO)₄ax-L), Re₂(CO)₆L₂(μ-X) (μ-GaX₂) (X = I), and Re₃(CO)₉L₃ (μ-X)₃(μ₃-Y) (X = Cl) The title compounds of the both types Re₂(CO)₄L(μ-X)₂(μ-Y) [L = (C₆H₅)₃P; X = Br, I; Y = GaRe(CO)₄ax-L] and Re₃(CO)₉L₃(μ-X)₃ (μ₃-Y) (X = Cl) were prepared by the reaction of GaX₃ (X = Cl, Br, I) and Re₂(CO)₈(ax-L)₂ in boiling mesitylene solution. The obtained substance Re₂(CO)₄L₂(μ-I)₂(μ-Y) and carbon monoxide gave the compound of the third type Re₂(CO)₆L₂(μ-I)(μ- GaI₂). The last-named single iodo-bridged dirhenium cluster could be therefore a precursor complex of the double iodo-bridged compound. The four diamagnetic substances were characterized by ³¹P n.m.r. spectroscopy and their molecular structures were acertained by X-ray measurements. The result of the single crystal X-ray analysis of Re₂(CO)₄L₂(μ-Br)₂ [μ-GaRe(CO)₄ax-L], a bridged coordination octahedron pair with a common face, and that of the edge-bridged pair Re₂(CO)₆L₂(μ-I)(μ-GaI₂) each possessing a Re? Re bond are especially treated in the present work.