Mitteilung der Abteilung für Anorganische Chemie der IUPAC

Metal Complexes with Anionic Ligands of Elements of the Main Group IV. IV. Homogenous and Heterogenous Transition Metal Complexes of the Dichlorobromo-, Dibromochloro-, and Tribromostannide Ligands Monosubstituted complexes of the type [M(CO)₅SnBr_3?nCl_n]^? are formed if the hexacarbonyls of chromium, molybdenum, and tungsten are reacted with halogenostannide ions SnBr_3?nCl (n = 0, 1, 2). The reactions of dibenzene chromium and this stannide ions yield homogenous hexakis(trihalogenostannide)chromate(0) complexes [Cr(SnBr_3?nCl_n)₆]^6? (n = 1, 2). Both types of chromate(0) ions are isolated as salts with the cation [N(C₂H₅)₄]⁺. The behaviour of SnBr_3?nCl (n = 0–3) as ligands is discussed, the i. r. spectra of their metalcarbonyl derivatives are reported.