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A Macrocyclic Silver Polycarbene Complex Based on 1,2,4-Triazole Units: Synthesis and Postsynthetic Modification

Abstract

The facile synthesis and postsynthetic modification of a rectangular 1,2,4-triazole-based NHC macrocycle has been developed. The silver complex [Ag2(1)2](BF4)2 is derived from the corresponding triazolium salt H2-1(BF4)2 upon reaction with Ag2O. The metallocyclic Ag-NHC complex [Ag2(1)2](BF4)2 was determined by single-crystal X-ray diffraction analysis. The metal–carbene template undergoes photodimerisation of its terminal cinnamic esters (UV irradiation, λ = 365 nm) and generates a macrocyclic tetra(NHC) ligand. The desired tetra-1,2,4-triazolium macrocycle was isolated in good yields by eliminating the metal ions from the photodimerisation product. All complexes were fully characterized by multinuclear NMR measurements (1H, 13C{1H }, COSY, HSQC and HMBC) and ESI mass spectroscopy.

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Publication details

The article was received on 14 Jan 2018, accepted on 12 Feb 2018 and first published on 12 Feb 2018


Article type: Paper
DOI: 10.1039/C8DT00169C
Citation: Dalton Trans., 2018, Accepted Manuscript
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    A Macrocyclic Silver Polycarbene Complex Based on 1,2,4-Triazole Units: Synthesis and Postsynthetic Modification

    L. Zhang and Y. Han, Dalton Trans., 2018, Accepted Manuscript , DOI: 10.1039/C8DT00169C

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