Formation of very large rings in polymeric lanthanide complexes of N,N′-p-phenylenedimethylenebis(pyrrolidin-2-one)
作者:David M.L. Goodgame、Stephan Menzer、Andrew T. Ross、David J. Williams
DOI:10.1016/s0020-1693(96)05266-8
日期:1996.10
crystal X-ray diffraction studies show that crystals of [Tb2(NO3)6(p-XBPYR)3] are triclinic, space group . The p-XBPYR ligands bridge Tb centres so as to form sheets of contiguous 78-membered rings. Crystal of Pr(p-XBPYR)3(ClO4)3·0.5(CH3CN) are monoclinic, space group . The p-XBPYR ligands again bridge the metal centres but in this case a complex array of 52- and 26-membered rings is formed. Each Pr atom
合成报道的Ñ,ñ ' - p -phenylenedimethylenebis(吡咯烷)-2-酮)(p -XBPYR),的范围内的镧系元素(LN)的类型的复合物LN 2(NO 3)6(p -XBPYR)3和Ln(p -XBPYR)3(ClO 4)3(H 2 O)3,以及化合物Y 2(NO 3)6(p -XBPYR)3和Pr(p -XBPYR)3(ClO 4)3 ·0.5(CH 3 CN)。单晶X射线衍射研究表明[Tb 2(NO 3)6(p -XBPYR)3 ]的晶体是三斜晶空间群。所述p -XBPYR配体桥接Tb的中心,以连续的78元环的形式表。Pr(p -XBPYR)3(ClO 4)3 ·0.5(CH 3 CN)晶体为单斜晶空间群。该p-XBPYR配体再次桥接金属中心,但在这种情况下,形成了52和26元环的复杂阵列。每个Pr原子都有一个与之相连的双齿高氯酸盐基团,但其他高氯酸盐作为阴离子存在于晶格中。