Photochemical Modification of Carbene-Based Metallacycles: A Facile Route to Polycarbene Complexes and Their Derivatives
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https://figshare.com/articles/dataset/Photochemical_Modification_of_Carbene_Based_Metallacycles_A_Facile_Route_to_Polycarbene_Complexes_and_Their_Derivatives/2094553
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资源简介：
The modification of dinuclear silver
metallcycles via photochemical
[2 + 2] cycloaddition is described. Reaction of benzimidazole with trans-4,4′-dibromostilbene gives trans-4,4′-bis(1H-benzo[d]imidazolyl)stilbene
(L), which after subsequent dialkylation with alkyl bromides
and anion exchange yields the corresponding dibenzimidazolium salts
H2-1(PF6)2 and H2-2(PF6)2. The dibenzimidazolium
salts react with Ag2O to give the dinuclear silver(I) tetracarbene
metallacycles Ag2(1)2(PF6)2 and Ag2(2)2(PF6)2 in high yield. Irradiation (UV light, λ
365 nm) of Ag2(1)2(PF6)2 and Ag2(2)2(PF6)2 in [D6]DMSO resulted in rapid conversion
into the corresponding dinuclear cyclobutane-carbene complexes Ag2(3)(PF6)2 and Ag2(4)(PF6)2 quantitatively. The
cyclobutane-bridged polycarbene precursors were isolated in good yields
as their tetrabenzimidazolium salts.
创建时间：
2016-02-12
