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首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >Monomeric and dimeric nitrate lanthanide(III) and yttrium(III) coordination compounds of (2+2) imine macrocycle derived from 2,6-diformylpyridine and trans-1,2-diaminocyclopentane
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Monomeric and dimeric nitrate lanthanide(III) and yttrium(III) coordination compounds of (2+2) imine macrocycle derived from 2,6-diformylpyridine and trans-1,2-diaminocyclopentane

机译：（2 + 2）亚胺叶绿素（III）和钇（III）配位化合物的单体和二聚体镧系元素（III）和亚氨基甲酰胺衍生自2,6-二甲基吡啶和反式-1,2-二氨基环戊烷

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摘要

Monomeric nitrate coordination compounds [Ln(L1)](NO3)(3)center dot nH(2)O (Ln = Y(III), Tm(III), Yb(III) and Lu(III)); n = 0, 0.75 or 3)(1) of the chiral macrocyclic (2 + 2) imine L1 (L1(RRRR), L1(SSSS) and/or L1(rac)), derived from enantiomerically pure or racemic trans-1,2-diaminocyclopentane (DACP) and 2,6-diformylpyridine (DFP), have been synthesized in the templated condensation of precursors in the presence of appropriate metal salts. From these monomers their homochiral l-hydroxodimers [Ln(2)(L1)(2)(mu-OH)(2)](NO3)(4)center dot nH(2)O (Ln = Y(III), Tm (III), Yb(III) and Lu(III)); n = 4, 5 or 7) have been obtained and isolated by addition of NaOH to the respective monomeric form of coordination compound solution. All synthesized coordination compounds have been characterized by NMR spectroscopy, mass spectrometry, elemental analyses and/or circular dichroism (CD). H-1 NMR signals of CDCl3/CD3OD solutions of the diamagnetic Y(III) and Lu(III) monomers have been assigned on the basis of their COSY and HMQC spectra, and for the remaining paramagnetic lanthanide coordination compounds (Tm(III) and Yb(III)) the signals were tentatively assigned on the basis of linewidths analyses. 1H NMR signals of D2O solutions of diamagnetic Y(III) and Lu(III) representatives of dimeric species have been established taking into account their COSY, HMQC, HMBC and NOESY spectra. The NOESY spectra confirm that the structure of the dimmers observed in solids is also maintained in a solution.
机译：单体硝酸盐配位化合物[LN（L1）]（NO 3）（3）中心点NH（2）O（LN = Y（III），TM（III），YB（III）和LU（III））; N = 0，0.75或3）（1）的手性宏环（2 + 2）亚胺L1（L1（RRRR），L1（SSSS）和/或L1（RAC）），来自对映体纯或外消旋反式1在适当的金属盐存在下，已经合成了2-二氨基环戊烷（DACP）和2,6-二羟基吡啶（DFP），在前体的模板凝结中合成。从这些单体中它们的冠制L-羟化器[LN（2）（L1）（2）（2）（2）（2））]（NO 3）（4）中心点NH（2）O（LN = Y（III），TM （iii），YB（III）和Lu（III））;通过向各自的配位化合物溶液添加NaOH获得并分离N = 4,5或7）。所有合成的配位化合物的特征在于NMR光谱，质谱，元素分析和/或圆形二色性（CD）。在其舒适和HMQC光谱的基础上分配了二磁性Y（III）和LU（III）和Lu（III）单体的CDCl3 / CD3od溶液的H-1 NMR信号，以及剩余的顺磁性镧系元素配位化合物（TM（III）和YB（iii））在线宽度分析暂时分配信号。考虑到其舒适，HMQC，HMBC和NOESY光谱，确定了二聚体y（III）和Lu（III）和Lu（III）和Lu（III）代表的D2O溶液的NMR信号。 NOESY光谱确认，在固体中观察到的调光器的结构也保持在溶液中。

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