Structural and theoretical studies of (E,E)-benzaldehyde azine and its rhenium(IV) complex
摘要:
The azine bridged dicatechol ligand (E,E)-benzaldehyde azine (H4L) was fully characterized by X-ray analysis. The reaction of [ReCl6](2-) with this compound was studied and the novel Re(IV) complex (HNEt3)(N-Bu-4)[ReCl4(H2L)] was prepared and characterized. The structure and spectroscopy of the compound H4L and its Re(IV) complex were studied experimentally and by means of density functional calculations. (C) 2009 Elsevier B.V. All rights reserved.
Magneto-structural correlations in a family of Re<sup>IV</sup>Cu<sup>II</sup> chains based on the hexachlororhenate(<scp>iv</scp>) metalloligand
作者:Anders H. Pedersen、Miguel Julve、José Martínez-Lillo、Joan Cano、Euan K. Brechin
DOI:10.1039/c7dt02216f
日期:——
Six novel one-dimensional chloro-bridged ReIVCuII complexes of formula [Cu(L)4][ReCl6]}n are characterised structurally, magnetically and theoretically.
The First Use of a ReX<sub>5</sub>Synthon to Modulate Fe<sup>III</sup>Spin Crossover via Supramolecular Halogen⋅⋅⋅Halogen Interactions
作者:Rebecca Busch、Anthony B. Carter、Konstantis F. Konidaris、Irina A. Kühne、Ricardo González、Christopher E. Anson、Annie K. Powell
DOI:10.1002/chem.202001668
日期:2020.9.10
ligand to provide supramolecular design usinghalogen⋅⋅⋅halogeninteractions within an FeIII system that has the potential to undergo spin crossover (SCO). By removing the solvent from the crystal lattice, we “switch on” halogen⋅⋅⋅halogeninteractions between neighboring molecules, providing a supramolecular cooperative pathway for SCO. Furthermore, changes to the halogen‐based interaction allow us to modify
我们将 Re IV X 5 } − (X=Br, Cl) 合成子添加到基于口袋的配体中,以使用 Fe III系统内的卤素·····卤素相互作用提供超分子设计,该系统有可能发生自旋交叉(上合组织)。通过从晶格中去除溶剂,我们“打开”相邻分子之间的卤素·····卤素相互作用,为 SCO 提供了超分子合作途径。此外,卤素相互作用的改变使我们能够改变 SCO 事件的温度和性质。
Magneto-structural correlations in dirhenium(<scp>iv</scp>) complexes possessing magnetic pathways with even or odd numbers of atoms
作者:Anders H. Pedersen、Miguel Julve、José Martínez-Lillo、Joan Cano、Euan K. Brechin
DOI:10.1039/c7dt02612a
日期:——
exchange between the metalions is dictated by the number of intervening atoms. That is, the spin-polarization mechanism present dictates that odd and even numbers of atoms favour ferromagnetic (F) and antiferromagnetic (AF) exchange interactions, respectively. Hence, while the pyz ligand in 1 and 2 mediates AF coupling, the pym and triz ligands in 3 and 4 promote F interactions.
在Re IV化学中使用吡嗪(pyz),嘧啶(pym)和s-三嗪(triz)配体导致分离出通式(NBu 4)2 [(ReX 5)2((- L)](L = pyz,X = Cl(1)或Br(2); L = pym,X = Br(3); L = triz,X = Br(4))。1-4是双核化合物,其中两个五卤hen(IV)片段通过双齿pyz,pym和triz配体连接。可变温度的磁测量,结合详细的理论研究,揭示了潜在的磁-结构相关性,由此金属离子之间的交换性质由中间原子的数量决定。即,存在的自旋极化机制要求奇数和偶数原子分别有利于铁磁(F)和反铁磁(AF)交换相互作用。因此,虽然1和2中的pyz配体介导了AF偶联,但3和4中的pym和triz配体却促进了F相互作用。
Metamagnetic behaviour in a new Cu(ii)Re(iv) chain based on the hexachlororhenate(iv) anion
作者:José Martínez-Lillo、John Kong、Wdeson P. Barros、Juan Faus、Miguel Julve、Euan K. Brechin
DOI:10.1039/c4cc01564a
日期:——
A new chloro-bridged heterobimetallic Cu(II)Re(IV) chain of formula Cu(pyim)(Him)2ReCl6}n·MeCN (1·MeCN) has been prepared and magnetostructurally characterised. Compound 1 is the first example of the [ReIVCl6]2− anion acting as a metalloligand towards a paramagnetic metal ion.
The Effect of Crystal Packing and Re<sup>IV</sup>Ions on the Magnetisation Relaxation of [Mn<sub>6</sub>]-Based Molecular Magnets
作者:José Martínez-Lillo、Joan Cano、Wolfgang Wernsdorfer、Euan K. Brechin
DOI:10.1002/chem.201500439
日期:2015.6.8
The energy barrier to magnetisationrelaxation in single‐molecule magnets (SMMs) proffers potential technological applications in high‐density information storage and quantum computation. Leading candidates amongst complexes of 3d metals ions are the hexametallic family of complexes of formula [Mn6O2(R‐sao)6(X)2(solvent)y] (saoH2=salicylaldoxime; X=mono‐anion; y=4–6; R=H, Me, Et, and Ph). The recent
单分子磁体(SMM)中磁化弛豫的能垒为高密度信息存储和量子计算提供了潜在的技术应用。3d金属离子络合物中最主要的候选化合物是式[Mn 6 O 2(R-sao)6(X)2(溶剂)y ](saoH 2 =水杨醛肟; X =单阴离子;y = 4–6; R = H,Me,Et和Ph)。阳离子[Mn 6 ] [ClO 4 ] 2家族成员的最新合成,其中用非配位阴离子取代了配位X离子,为构建新型[Mn]家族打开了大门。6 ]盐,其中可以使用电荷平衡阴离子的特性和性质来改变配合物的物理性质。在这里,我们演示了初步的实验,以证明这确实是可能的。通过更换反磁性CLO 4 -与高度各向异性重新阴离子IV中的[再形式离子IV氯6 ] 2-,能量势垒,以磁化松弛增加高达30%。