Cyanide-bridged trinuclear complexes based on central bis(hexafluoroacetylacetonate)metal units
摘要:
By treatment of the complexes (hfa)(2)M (M = Mn, Fe, Co, Ni, Cu, Zn, Cd; hfa= hexafluoroacetylacetonate) with the metallocyanides LnM'-CN (LnM' = Cp(dppe)Fe and Cp(PPh3)(2)Ru) 14 trinuclear complexes LnM'N-M(hfa)(2)-NC-M'L-n were obtained. Their IR data and four structure determinations have shown that they contain essentially linear M'-CN-M-NC-M' arrays, i.e. have trans-configured M(hfa)(2)(NC)(2) centers. Only complex Cp(PPh3)(2)Ru-CN-Co(hfa)(2)-NC-Ru(PPh3)(2)Cp was also obtained and structurally characterized as the cis isomer. Cyclic voltammetry has yielded no indication that there is electronic communication between the external LnM units upon oxidation. (C) 2000 Elsevier Science B.V. All rights reserved.
Putting Cocrystal Stoichiometry to Work: A Reactive Hydrogen-Bonded “Superassembly” Enables Nanoscale Enlargement of a Metal–Organic Rhomboid via a Solid-State Photocycloaddition
作者:Qianli Chu、Andrew J. E. Duncan、Giannis S. Papaefstathiou、Tamara D. Hamilton、Manza B. J. Atkinson、S. V. Santhana Mariappan、Leonard R. MacGillivray
DOI:10.1021/jacs.8b01775
日期:2018.4.11
Enlargement of a self-assembled metal-organic rhomboid is achieved via the organicsolidstate. The solid-state synthesis of an elongated organic ligand was achieved by a template directed [2 + 2] photodimerization in a cocrystal. Initial cocrystals obtained of resorcinol template and reactant alkene afforded a 1:2 cocrystal with the alkene in a stacked yet photostable geometry. Cocrystallization performed
Synthesis, crystal structure, and magnetic properties of a nitronyl nitroxide biradical-coordinated copper(II) complex
作者:Yan-Li Gao、Pingqiang Gao、Ying Gong、Guoyu Ren
DOI:10.1177/1747519820982539
日期:2021.5
enzene, hfac = hexafluoroacetylacetonato] is successfully synthesized. The crystalstructure is determined by X-ray single-crystal diffraction. The asymmetric complex [(NITPh(3-NIT)]Cu(hfac)2} consists of one Cu(II) ion and two >N–O• groups and adopts a distorted triangular bipyramid with a penta-coordinated central copper(II) atom and three hfac oxygen atoms at the base and a >N–O• oxygen atom and
Syntheses, crystal structures, and magnetic properties of two cyclic dimer M2L2 complexes constructed from a new nitronyl nitroxide ligand and M(hfac)2 (M=Cu2+, Mn2+)
Twonew binuclear radical complexes derived from a new long nitronyl nitroxide ligand, 2-[4-(5-pyrimidyl)phenyl]-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (4-NITPhPyrim), and M(hfac) 2 (M 2+ = Cu 2+ , Mn 2+ ; hfac − = hexafluoroacetylacetonato), [Cu(hfac) 2 (4-NITPhPyrim)] 2 · 4H 2 O ( 1 ) and [Mn(hfac) 2 (4-NITPhPyrim)] 2 · 4H 2 O ( 2 ), were synthesized as well as characterized structurally and
由新的长硝酰基硝基氧配体2- [4-(5-嘧啶基)苯基] -4,4,5,5-四甲基咪唑啉-1-氧基-3-氧化物(4-NITPhPyrim)衍生的两个新的双核自由基络合物,和M(hfac)2(M 2+ = Cu 2+,Mn 2+; hfac-=六氟乙酰丙酮),[Cu(hfac)2(4-NITPhPyrim)] 2·4H 2 O(1)和[Mn(hfac )2(4-NITPhPyrim)] 2·4H 2 O(2)的合成以及结构和磁性特征。X射线分析表明1和2是矩形的中心对称二聚体M 2 L 2络合物。磁测量表明1中存在两种类型的磁交换:Cu(II)离子与直接键合的一氧化氮单元(J 1 = 24.20 cm -1)之间的铁磁(FM)交换和Cu–的弱FM交换。 NIT通过嘧啶和苯环(J 2 = 0.62 cm -1)。
Nitronyl nitroxide bridged 3d–4f hetero-tri-spin chains: synthesis strategy, crystal structure and magnetic properties
de). The crystalstructures of complex 1 reveal that it is developed from alternating Dy(hfac)3 units and Cu(hfac)2 units bridged by NIT-PhOEt radicals coordinated by their NO groups. Complexes 2 and 3–8 are isostructural possessing 1D chains with repeating [Cu–Rad–Ln–Rad–Ln–Rad–Ln–Rad] moieties. The magneticproperties of all complexes were studied. For complexes 1 and 2, their magnetic behaviors
A novel approach for the preparation of hetero-tri-spin magnetic compounds is described. It consists in using preformed metalânitronyl nitroxide complexes as metallo-ligands in an assembling process involving an additional metal centre. This is illustrated by two unprecedented radicalâCuâLn chain compounds (Ln = Gd3+, Tb3+).