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The 12-ethynylmonocarba-closo-dodecaborate anion as a versatile ligand for Cu(I) alkyne and heterobimetallic Cu(I)/M(II) (M = Pd, Pt) alkynide complexes

Abstract

The anionic monocarborane alkyne [12-(HC≡C)-CB11H11]– was employed as a ligand towards Cu(I) to form terminal alkyne complexes. Spectroscopic methods and X-ray crystallography allowed for a detailed structural analysis of complexes with nitrogen ligands, which are the first examples featuring carborane-C≡CH→metal π coordination. Addition of phosphines to compound 2 afforded homoleptic Cu(I) complexes [Cu(PR3)n]+ (4), in which case the carborane becomes a non-coordinating anion. Polymeric acetylide 5 was obtained in almost quantitative yield from 2 and proved to be a suitable precursor to heterobimetallic Cu(I)/M(II) (M = Pd, Pt) alkynide complexes with side-on and end-on coordination to the metal centers.

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Publication details

The article was received on 11 Aug 2019, accepted on 08 Oct 2019 and first published on 09 Oct 2019


Article type: Paper
DOI: 10.1039/C9DT03272J
Dalton Trans., 2019, Accepted Manuscript

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    The 12-ethynylmonocarba-closo-dodecaborate anion as a versatile ligand for Cu(I) alkyne and heterobimetallic Cu(I)/M(II) (M = Pd, Pt) alkynide complexes

    T. Jiang, K. Zhang, Y. Shen, M. Hamdaoui, R. Dontha, J. Liu, B. Spingler and S. Duttwyler, Dalton Trans., 2019, Accepted Manuscript , DOI: 10.1039/C9DT03272J

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