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A [C1+C2] Route to Propargylidyne Complexes

Abstract

The reactions of [W(ΞCBr)(CO)2(Tp*)] (Tp* = hydrotris(dimethylpyrazolyl)borate) with a range of terminal alkynes (RCΞCH), mediated by [Pd(PPh3)4] and CuI, afford new proparylidynes [W(ΞC–CΞCR)(CO)2(Tp*)] [R = tBu, C6H4X (X = H, NH2, NO2), APh3 (A = C, Si, Ge), B(O2CCH2)2NMe]. Similar treatment of [W(ΞCBr)(CO)2(Tp*)] with Ph2Si(CΞCH)2 affords the ditungstaoctatetrayne [W2(μ-C6)(CO)4(Tp*)2] while the bimetallic complex [W2{μ-(ΞCCΞC)2SiPh2}(CO)4(Tp*)2], which is obtained from [W(ΞCBr)(CO)2(Tp*)] and Ph2Si(CΞCSnPh3)2, reacts with [AuCl(THT)] (THT = tetrahydrothiophene) to provide the tetrametallic complex [W2Au2{μ-(ΞCCΞC)2SiPh2}Cl2(CO)4(Tp*)2].

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Publication details

The article was received on 27 Feb 2019, accepted on 04 Apr 2019 and first published on 04 Apr 2019


Article type: Paper
DOI: 10.1039/C9DT00876D
Citation: Dalton Trans., 2019, Accepted Manuscript

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    A [C1+C2] Route to Propargylidyne Complexes

    A. Hill and R. Manzano, Dalton Trans., 2019, Accepted Manuscript , DOI: 10.1039/C9DT00876D

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