Stoichiometric sensitivity and structural diversity in click-active copper(<scp>i</scp>) N,S-heterocyclic carbene complexes
作者:Xiaoyan Han、Zhiqiang Weng、David James Young、Guo-Xin Jin、T. S. Andy Hor
DOI:10.1039/c3dt52059e
日期:——
A series of novel Cu(I) N,S-heterocyclic carbene (NSHC) complexes [Cu(μ-Br)(NSHC)]2, [Cu(μ-X)(NSHC)]4 (X = Br or I), [(NSHC)2Cu(μ-Br)2Cu(NSHC)], and [(NSHC)2CuBr] have been isolated from in situ generated CuOtBu and N-substituted benzothiazolium halides and characterized by X-ray crystallography. Five structural motifs were observed, viz. MxLy where x : y = 2 : 2, 4 : 4, 2 : 3, 1 : 2 and 2 : 4, with
一系列新颖的Cu(I)N,S-杂环卡宾(NSHC)配合物[Cu(μ-Br)(NSHC)] 2,[Cu(μ-X)(NSHC)] 4(X = Br或I) ,[(NSHC)2 Cu(μ-Br)2 Cu(NSHC)]和[(NSHC)2 CuBr]已从原位生成的CuO t Bu和N-取代的苯并噻唑鎓卤化物中分离出来,并通过X射线晶体学表征。观察到五个结构基序,即。M x L y其中x : y= 2:2、4:4、2:3、1:2和2:4,Cu⋯Cu的间距跨度范围为2.5626(7)至3.4725(7)Å。对这些化合物的催化活性的初步研究表明,不寻常的单核络合物6 [(NSHC)2 CuBr]是叠氮化物和炔烃的Huisgen 1,3-偶极环加成反应的活性催化剂,而络合物1-5和7则微不足道。不太活跃。