[Cr(phen)(ox)2]-: a versatile bis-oxalato building block for the design of heteropolymetallic systems. Crystal structures and magnetic properties of AsPh4[Cr(phen)(ox)2]·H2O, [NaCr(phen)(ox)2(H2O)]·2H2O and {[Cr(phen)(ox)2]2[Mn2(bpy)2(H2O)2(ox)]}·6H2O

Marinescu, Gabriela; Andruh, Marius; Lescouëzec, Rodrigue; Muñoz, M. Carmen; Cano, Juan; Lloret, Francesc; Julve, Miguel

doi:10.1039/b002246m

Cited by 87 publications

(31 citation statements)

References 33 publications

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“…The chromium atom is six-coordinated in a distorted octahedral coordination assured by two pyim nitrogen atoms and four oxalate oxygens from two oxalate groups. Bond lengths and angles around Cr(1) compare well with those observed in the analogous complexes [Cr(AA)(ox) 2 ] À [AA = 2,2 0 -dipyridylamine (dpa); 2,2 0 -bipyridine (bipy); 1,10-phenanthroline (phen)] [10][11][12]. The sodium atom is also six-coordinated with a water oxygen atom [2.322(4) Å for Na (1) Thermal stability of the complex was studied by differential scanning calorimeter (DSC) and thermogravimetry (TG) as shown in Fig.…”

supporting

confidence: 61%

“…So far, a wide range of one-or multi-dimensional infinite solid-state coordination architectures have been achieved by applying [M z+ (ox) 3 ] (6Àz)À building blocks as useful and versatile bridging ligands in the last four decades [5][6][7][8][9]. When one of three oxalates was replaced by a bidentate chelating ligand (AA) [AA = 2,2 0 -dipyridylamine (dpa); 2,2 0 -bipyridine (bipy); 1,10-phenanthroline (phen)], a new building block [Cr(AA)(ox) 2 ] À was formed and applied to construct coordination polymers with the desired topologies and interesting properties [10][11][12]. Following this strategy, attempt to design a new building block [Cr(pyim)(ox) 2 ] À (pyim = 2-(2-pyridyl)-imidazole) was proved to be rational and successful.…”

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confidence: 99%

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Two-dimensional oxalate-bridged heterometallic coordination polymer: Crystal structure and thermal behavior of [NaCr(pyim)(ox)2(H2O)]·2H2O (pyim=2-(2′-pyridyl)imidazole)

Zhang

Peng

et al. 2006

Inorganic Chemistry Communications

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confidence: 61%

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confidence: 99%

Two-dimensional oxalate-bridged heterometallic coordination polymer: Crystal structure and thermal behavior of [NaCr(pyim)(ox)2(H2O)]·2H2O (pyim=2-(2′-pyridyl)imidazole)

Zhang

Peng

et al. 2006

Inorganic Chemistry Communications

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“…Each oxalate molecule occupies special position on the inversion center at the middle of C-C bond. [8,9]. The anionic layers possess well-known distorted honeycomb topology [8] .…”

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confidence: 99%

Novel heterobimetallic Cu/Mn coordination polymers prepared by “direct permanganate” synthesis

Beznischenko

Makhankova

Kokozay

et al. 2007

Inorganic Chemistry Communications

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“…A water molecule occupies the vacant position in the coordination sphere of the Mn 2+ center. References in the literature concerning this unusual bridging mode are very scarce 16, 17. In our complex, the linkage (dashed bonds in Figure 2) takes place between a Cr(ox) 3 building block and a Mn(ox) 3 (H 2 O) unit of opposite chirality.…”

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confidence: 79%

Nitroxide Radicals as Templating Agents in the Synthesis of Magnets Based on Three-Dimensional Oxalato-Bridged Heterodimetallic Networks

et al. 2001

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Building an extended compound with a particular crystal structure from molecular precursors in solution is still a challenge in many areas of chemistry. [1] Coordination chemistry provides a useful algorithm for this purpose (lattice engineering) because coordination geometries are well defined by strong and highly directional bonds. This concept is especially relevant in the synthesis of molecular magnetic materials since metal complexes provide the spin carriers (metal ions) and ligands through which magnetic interactions can occur. [2] The ability of the oxalate (ox) ion, C 2 O 4 2À , to transmit efficiently magnetic interactions through its bridging mode has been well documented since the pioneering work on dinuclear copper(ii) complexes. [3] Later, the use of the homoleptic species [M(ox) 3 ] 3À (M Cr III , Fe III ) provided an easy access to systems of higher dimensionality. [4] Only two families of high-dimensional oxalato complexes displaying magnetic order have been described: a) two-dimensional (2D) heterodimetallic compounds of formula A[M II M III (ox) 3 ] (A quaternary onium cation, M metal) with a honeycomb-layered structure [5] and b) three-dimensional (3D) homometallic compounds of formula A[M 2 II (ox) 3 ] or A[M II -M III (ox) 3 ](ClO 4 ) (A [M(bpy) 3 ] 2 ) with a cubic chiral pack-ing. [6] The resulting dimensionality depends on the type of A m ion used, so that these cations can be considered as templating agents for the overall structure. [7] There is a fine interplay between molecular recognition and chirality in this kind of system: 2D structures are achiral but, within each layer, all the M III sites have the same chirality while all the M II sites have the opposite one; in the 3D systems, both sites adopt the same configuration. In all cases, the enantioselective synthesis of the optically active stereoisomers using chiral building blocks is possible. [8] Besides their role as structuredirecting agents, the A m ions can also introduce physical properties of interest to the magnetic system, leading to multiproperty materials. Along this line, we have synthesized a family of 2D compounds where the ªinnocentº quaternary onium cation has been replaced by redox-active species of the decamethylmetallocenium type [9] or organic donors such as BEDT-TTF (2,2'-bis(5,6-dihydro-1,3-dithiolo[4,5-b][1,4]di-(50 MHz, CDCl 3 ): d

show abstract

[Cr(phen)(ox)2]-: a versatile bis-oxalato building block for the design of heteropolymetallic systems. Crystal structures and magnetic properties of AsPh4[Cr(phen)(ox)2]·H2O, [NaCr(phen)(ox)2(H2O)]·2H2O and {[Cr(phen)(ox)2]2[Mn2(bpy)2(H2O)2(ox)]}·6H2O

Cited by 87 publications

References 33 publications

Two-dimensional oxalate-bridged heterometallic coordination polymer: Crystal structure and thermal behavior of [NaCr(pyim)(ox)2(H2O)]·2H2O (pyim=2-(2′-pyridyl)imidazole)

Two-dimensional oxalate-bridged heterometallic coordination polymer: Crystal structure and thermal behavior of [NaCr(pyim)(ox)2(H2O)]·2H2O (pyim=2-(2′-pyridyl)imidazole)

Novel heterobimetallic Cu/Mn coordination polymers prepared by “direct permanganate” synthesis

Nitroxide Radicals as Templating Agents in the Synthesis of Magnets Based on Three-Dimensional Oxalato-Bridged Heterodimetallic Networks

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