Chemistry of Hume-Rothery inspired organometallics: Selective functionalization of [M(ZnCp*)4(ZnCH3)4] (M = Ni, Pd, Pt) with terminal alkynes to yield [M(ZnCp*)4(ZnCCSiiPr)4]

Publication date: Available online 17 February 2018 Source:Journal of Organometallic Chemistry Author(s): Julius Hornung, Jana Weßing, Mariusz Molon, Katharina Dilchert, Christian Gemel, Roland A. Fischer The all-zinc coordinated group-8 metal complexes [M(ZnCp*)4(ZnCCSi( i Pr)3)4] (M = Ni (1), Pd (2), Pt (3)) were obtained by selective functionalization of the protecting organic ligand shell starting out from the organometallic MZn8-complexes [M(ZnCp*)4(ZnMe)4]. The reaction with excess HCCSi( i Pr)3 leads to a stepwise exchange of the methyl to alkynyl groups under liberation of methane over very long reaction times at elevated temperatures. All complexes 1–3 were isolated in pure form an in good yields and were fully characterized by 1H, 13C NMR as well as by liquid injection field desorption (LIFDI) mass spectrometry. In addition, single crystal structure analysis of 1 and 3 were performed showing that the bimetallic dodecahedral [MZn8] core of the starting complexes remains intact in the product complexes.
Source: Journal of Organometallic Chemistry - Category: Chemistry Source Type: research
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