Synthesis of Well-Defined N-Heterocyclic Carbene Silver(I) Complexes
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A series of N-heterocyclic carbene (NHC)AgCl complexes [NHC = SIMes (1), IPr (2), SIPr
(3), IPrMe (4), IMe (5), ICy (6), IAd (7), IsB (8), IDD (9), and TPh (10)] have been synthesized
through reaction of the imidazolium chloride salts with Ag2O or by direct metalation of the
corresponding imidazol-2-ylidene carbene in the presence of AgCl. All silver(I) complexes
[(SIMes)AgCl] (11), [(IPr)AgCl] (12), [(SIPr)AgCl] (13), [(IPrMe)AgCl] (14), [(IMe)AgCl] (15),
[(ICy)AgCl] (16), [(IAd)AgCl] (17), [(IsB)AgCl] (18), [(IDD)AgCl] (19), and [(TPh)AgCl] (20)
have been spectroscopically and structurally characterized. The structure of these silver
complexes is dependent on the halide and the solvent used for the synthesis. Adjusting these
parameters has led to the previously reported complex, [(IMes)2Ag]+[AgCl2]- (21), and to a
new silver complex, [(IMes)2Ag]+2[Ag4I6]2- (22).
一系列N-杂环卡宾银氯化物复合物[NHC = SIMes (1), IPr (2), SIPr (3), IPrMe (4), IMe (5), ICy (6), IAd (7), IsB (8), IDD (9), 以及TPh (10)]通过咪唑盐酸盐与Ag2O的反应或直接金属化相应的咪唑-2-亚基卡宾在AgCl存在下合成。所有银(I)复合物[(SIMes)AgCl] (11), [(IPr)AgCl] (12), [(SIPr)AgCl] (13), [(IPrMe)AgCl] (14), [(IMe)AgCl] (15), [(ICy)AgCl] (16), [(IAd)AgCl] (17), [(IsB)AgCl] (18), [(IDD)AgCl] (19), 以及[(TPh)AgCl] (20)均已通过光谱学和结构表征。这些银复合物的结构取决于合成过程中所用的卤素和溶剂。调整这些参数已导致先前报道的复合物[(IMes)2Ag]+[AgCl2]- (21),以及一种新的银复合物[(IMes)2Ag]+2[Ag4I6]2- (22)。
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