A supramolecular assembly of side-by-side polyimidazole tripod coils stabilized by π–π stacking and unique boric acid templated hydrogen bonding interactions
[EN] TECHNETIUM- AND RHENIUM-BIS(HETEROARYL) COMPLEXES, AND METHODS OF USE THEREOF [FR] COMPLEXES DE TECHNETIUM- ET RHENIUM-BIS(HETEROARYLE), ET LEURS PROCEDES D'UTILISATION
A Very Rare Example of a Structurally Characterized 3′-GMP Metal Complex. NMR and Synthetic Assessment of Adducts Formed by Guanine Derivatives with [Pt(L<sup>tri</sup>)Cl]Cl Complexes with an N,N′,N″ Tridentate Ligand (L<sup>tri</sup>) Terminated by Imidazole Rings
作者:Kokila Ranasinghe、Svetlana Pakhomova、Patricia A. Marzilli、Luigi G. Marzilli
DOI:10.1021/acs.inorgchem.7b01176
日期:2017.7.17
[Pt(N(R)-1,1′-Me2dma)Cl]Cl complexes with tridentate ligands (bis(1-methyl-2-methylimidazolyl)amine, R = H; N-(methyl)bis(1-methyl-2-methylimidazolyl)amine, R = Me) were prepared in order to investigate Pt(N(R)-1,1′-Me2dma)G adducts (G = monodentate N9-substituted guanine or hypoxanthine derivative). Solution NMR spectroscopy is the primary tool for studying metal complexes of nucleosides and nucleotides
Spin State Variations and Spin-Crossover in Diiron(II) Complexes of Bis(pentadentate) Pyrazolate-Based Ligands
作者:Anne Schober、Serhiy Demeshko、Franc Meyer
DOI:10.1002/zaac.201800148
日期:2018.8.2
ligands [LPy]− and [LIm]−, each providing two N5} binding sites but differing in the terminal N‐donors (pyridine vs. imidazole), were used to prepare a set of diferrous complexes; the ligand HLIm is new and its synthesis is reported. Complexes [LPyFe2(MeCN)2](OTf)3, (1OTf), [LPyFe2(MeCN)2](BF4)3 (1BF4), [LImFeFe(MeCN)}](OTf)3 (2OTf), and [LImFeFe(MeCN)}](BF4)3 (2BF4) were characterized by single‐crystal
隔室吡唑并桥的配体[L Py ] -和[L Im ] -各自提供两个N 5 }结合位点,但末端N供体不同(吡啶与咪唑),用于制备一组二铁配合物; 配体HL Im是新的,并且已报道了其合成。配合物[L Py Fe 2(MeCN)2 ](OTf)3,(1 OTf),[L Py Fe 2(MeCN)2 ](BF 4)3(1 BF4),[L ImFe Fe(MeCN)}](OTf)3(2 OTf)和[L Im Fe Fe(MeCN)}](BF 4)3(2 BF4)的特征在于单晶X射线衍射,表明在两个可进入双金属裂隙的Fe配位位点的两个(1 OTf,1 BF4)或仅一个(2 OTf,2 BF4)处存在MeCN大肠杆菌。磁测量(SQUID)和57 FeMößbauer光谱表明,在1 OTf和1 OTf中六配位Fe II离子的低自旋态。基于[L Py ] -的1 BF4,但基于[L Im ] -的2
N-(2-formyl-1-methylimidazol-4-yl)-2,2-dimethylpropanamide: a versatile reagent for preparing imidazole-amine ligands with variable second-coordination spheres
作者:Lionel E. Cheruzel、Jinlan Cui、Mark S. Mashuta、Craig A. Grapperhaus、Robert M. Buchanan
DOI:10.1016/j.tetlet.2011.07.025
日期:2011.9
Two synthetic pathways to N-(2-formyl-1-methylimidazol-4-yl)-2,2-dimethylpropanamide from 1-methyl-2-carboxaldehyde are described. The reagent serves as a useful synthon for reductiveamination reactions with primary and secondary amines in the presence of sodium cyanoborohydride to yield a series of ligands with second coordination sphere functional groups. Protocols for the syntheses of related imidazole
Series of Mn Complexes Based on
<i>N</i>
‐Centered Ligands and Superoxide – Reactivity in an Anhydrous Medium and SOD‐Like Activity in an Aqueous Medium Correlated to Mn
<sup>II</sup>
/Mn
<sup>III</sup>
Redox Potentials
monomeric Mn I I complex with the tridentate N-centered N 3 ligand tris[(1-methyl-2-imidazolyl)methyl]amine (TMIMA) ([Mn I I (TMIMA) 2 ] 2 + ); and(b) the structure of a monomeric Mn I I I complex with the tridentate N-centered N 2 O ligand 2-[(1-methyl-2-imidazolyl)methyl]amino}phenolate (PI - ) [ 2 ] ([Mn I I I (PI) 2 ] + ) (5). The latter was isolated both in the Mn I I and in the Mn I I I state
本文描述了两种晶体结构:(a) 单体 Mn II 配合物与三齿 N 中心 N 3 配体三[(1-甲基-2-咪唑基)甲基]胺 (TMIMA) ([Mn II (TMIMA) 2 ] 2 + ); (b) 单体 Mn III 配合物与三齿 N 中心 N 2 O 配体 2-[(1-methyl-2-imidazolyl)methyl]amino}phenolate (PI - ) [ 2 ] ([Mn III (PI) 2 ] + ) (5)。后者在 Mn II 和 Mn III 状态下都被分离出来,尽管只有 Mn III 晶体成功生长。它们是作为 SOD 模拟物制备的一系列 Mn 配合物的一部分,即 [Mn(BMPG)(H 2 O)] + (2) BMPG = N,N-bis[(6-methyl-.2-pyridyl)methyl ]甘氨酸}, [Mn(IPG)(MeOH)] + (3) IPG
Ligand design for site-selective installation of Pd and Pt centers to generate homo- and heteropolymetallic motifs
作者:Daniel L. M. Suess、Jonas C. Peters
DOI:10.1039/c003163a
日期:——
The modular synthesis of a series of nitrogen-rich polydentate ligands that feature a common pincer-type framework is reported. These ligands allow for site-selective installation of palladium and platinum to give rise to bi- and trimetallic complexes that have d(8)-d(8) interactions.