Supramolecular first-row transition metal complexes of 3-(3,5-dimethylpyrazol-1-yl)propanamide: Three different coordination modes
作者:Phil Liebing、Ling Wang、John W. Gilje、Liane Hilfert、Frank T. Edelmann
DOI:10.1016/j.poly.2019.02.056
日期:2019.5
Seven-membered κN,κO-chelate rings are present in the manganese(II) complex 5. In contrast, κN: κO-bridging coordination of Me2PPA in compounds 6 and 7 leads to formation of dimers comprising 14-membered ring systems. Furthermore, unusual κN-monodentate coordination of Me2PPA has been found in the structure of the hydrated copper(II) complex Cu(Me2PPA)2Cl2·2H2O (8). In the crystalline state, all four
摘要在丙烯酰胺中将3-叔丁基吡唑(1)或3,5-二甲基吡唑(2)进行迈克尔加成反应得到吡唑基丙酰胺型配体3-(3-叔吡唑-1-基)丙酰胺(3,= tBuPPA)和3-(3,5-二甲基吡唑-1-基)丙酰胺(4,= Me2PPA),分离产率高(3:80%,4:76%)。4与选定的第一行过渡金属氯化物(MnCl2·4H2O,CoCl2·6H2O,ZnCl2,CuCl2·2H2O)的反应提供了新的络合物MnCl2(Me2PPA)2(5),[MCl2(Me2PPA)] 2(M = Co(6),Zn(7))和CuCl2(Me2PPA)2·2H2O(8)。通过单晶X射线衍射对配体3和所有四个新的配合物5-8进行了结构表征。出人意料的是,晶体结构的测定揭示了这些配合物中吡唑基配体的三种不同配位模式。七元κN,锰(II)配合物5中存在κO螯合环。相反,化合物6和7中的Me2PPA的κN:κO桥联配位导致形成