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Large CuI8 Chalcogenone Cubic Cages with Non-interacting Counter Ion


Two mega size copper(I) cubic cages, [{Cu(Bptp)}8(PF6-)](PF6-)7 (1) and [{Cu(Bpsp)}8(PF6-)](PF6-)7 (2) supported by imidazole-2-chalcogenone ligands (Bptp = 2,6-bis(1-isopropylimidazole-2-thione)pyridine or Bpsp = 2,6-bis(1-isopropylimidazole-2-selone)pyridine) have been synthesized and characterized. The formation of ionic salts 1 and 2 were confirmed by FT-IR, multinuclear (1H, 13C, 31P and 19F) NMR, UV-vis, TGA, CHN analysis, BET, single crystal X-ray diffraction and powder X-ray diffraction techniques.To the best of our knowledge, these are the first examples of octanuclear copper(I) cluster in a perfect cubic architecture with copper-copper distances of 8.413 Å or 8.593 Å. Interestingly, these anion-centered CuI8 cubic arrangements are not supported by cubic centered ions or face centered molecules. Formation of cationic cubic cages were accompanied by the association of twelve ligands (Bptp or Bpsp) with eight trigonal planar [CuSe3] vertex. The cationic charge of cubic cages were satisfied by eight PF6- counter anions, in which one of the PF6- anion occupies at the centre of Cu8 cube without any interaction. The copper(I) cubic cages are found to be highly active catalysts in click chemistry as well as hydroamination reactions. The scope of the catalytic reactions have been investigated with thirty five different combinations in click reactions and six different combinations in hydroamination of alkynes.

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Publication details

The article was received on 10 Oct 2017, accepted on 06 Nov 2017 and first published on 07 Nov 2017

Article type: Paper
DOI: 10.1039/C7DT03796A
Citation: Dalton Trans., 2017, Accepted Manuscript
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    Large CuI8 Chalcogenone Cubic Cages with Non-interacting Counter Ion

    S. Katam and P. Ganesan, Dalton Trans., 2017, Accepted Manuscript , DOI: 10.1039/C7DT03796A

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