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Issue 12, 2018
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A macrocyclic silver polycarbene complex based on 1,2,4-triazole units: synthesis and postsynthetic modification

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Abstract

Facile synthesis and postsynthetic modification of a rectangular 1,2,4-triazole-based NHC macrocycle have been developed. The silver complex [Ag2(1)2](BF4)2 is derived from the corresponding triazole salt H2-1(BF4)2 upon reaction with Ag2O. The structure of 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-triazole macrocycle was isolated in good yield 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.

Graphical abstract: A macrocyclic silver polycarbene complex based on 1,2,4-triazole units: synthesis and postsynthetic modification

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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., 2018,47, 4267-4272
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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, 47, 4267
    DOI: 10.1039/C8DT00169C

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