μ2-Acetato-κ2O:O′-tris(μ2-ferrocenecarboxylato-κ2O:O′)bis[(N,N-dimethylformamide-κO)copper(II)]

Luo, Jian-Hai; Huang, Chang‐Cang; Huang, Xiaoqing; Wang, Jin-Gen

doi:10.1107/s0108270107044952

Cited by 5 publications

(5 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In both (I) and (II), the central Cu II atom moves above the equatorial (eq) O 4 plane towards the (Kato & Muto, 1988;Melnik, 1982). The CuÁ Á ÁCu separations in the dinuclear copper units in (I) and (II) are 2.6047 (3) and 2.6279 (7) Å , respectively, and these values are in close agreement with reported values (Youngme et al, 2008;Luo et al, 2008;Burrows et al, 2008). There are some general trends that can be seen by comparison of several copper acetate-type complexes from the literature (Reinen & Friebel, 1984;Sundberg et al, 1996).…”

Section: Resultssupporting

confidence: 89%

Supramolecular architecture of metal–organic frameworks involving dinuclear copper paddle-wheel complexes

Gomathi

Muthiah

2013

Acta Crystallogr C

View full text Add to dashboard Cite

The two centrosymmetric dinuclear copper paddle-wheel complexes tetrakis(μ-4-hydroxybenzoato-κ(2)O:O')bis[aquacopper(II)] dimethylformamide disolvate dihydrate, [Cu2(C7H5O3)4(H2O)2]·2C3H7NO·2H2O, (I), and tetrakis(μ-4-methoxybenzoato-κ(2)O:O')bis[(dimethylformamide-κO)copper(II)], [Cu2(C8H7O3)4(C3H7NO)2], (II), crystallize with half of the dinuclear paddle-wheel cage unit in the asymmetric unit and, in addition, complex (I) has one dimethylformamide (DMF) and one water solvent molecule in the asymmetric unit. In both (I) and (II), two Cu(II) ions are bridged by four syn,syn-η(1):η(1):μ carboxylate groups, showing a paddle-wheel cage-type structure with a square-pyramidal coordination geometry. The equatorial positions of (I) and (II) are occupied by the carboxylate groups of 4-hydroxy- and 4-methoxybenzoate ligands, and the axial positions are occupied by aqua and DMF ligands, respectively. The three-dimensional supramolecular metal-organic framework of (I) consists of three different R2(2)(20) and an R4(4)(36) ring motif formed via O-H···O and OW-HW···O hydrogen bonds. Complex (II) simply packs as molecular species.

show abstract

Section: Resultssupporting

confidence: 89%

Supramolecular architecture of metal–organic frameworks involving dinuclear copper paddle-wheel complexes

Gomathi

Muthiah

2013

Acta Crystallogr C

View full text Add to dashboard Cite

show abstract

“…1300 casesexcept 9the 4 carboxylate bridging ligands are identical (homoleptic complexes). Furthermore, the only 9 reported examples of heteroleptic complexes include 2 of the type [Cu 2 L 3 L′] , and 7 of the type [Cu 2 L 2 L′ 2 ]. − Additionally it should be noted that only a few examples with biologically relevant ligands, such as nucleobases, coordinated in the axial positions have been reported so far. ,− …”

Section: Introductionmentioning

confidence: 99%

Asymmetric and Symmetric Dicopper(II) Paddle-Wheel Units with Modified Nucleobases

Hassanein

Castillo

Gómez‐García³

et al. 2015

Crystal Growth & Design

View full text Add to dashboard Cite

New copper(II) paddle-wheel complexes with different modified nucleobases and simple molecules in the axial positions have been prepared by direct reactions between copper(II) salts and the corresponding uracil- or thymine-1-acetic acids under inert atmosphere to produce the two homoleptic complexes, [Cu2(μ-OOCCH2-T)4(G)2] and [Cu2(μ-OOCCH2-U)4(G)2], and the heteroleptic one [Cu2(μ-OOCCH2-T)2(μ-OOCCH2-U)2(G)2] (where OOCCH2-T = thymine-1-acetate, OOCCH2-U = uracil-1-acetate, and G = dimethylformamide, water, dimethylacetamide, or dimethyl sulfoxide). Interestingly, the crystal structures of this family of closely related molecules present significant differences in their supramolecular arrangements affecting the crystal networks mainly due to the interactions defined between the different apical ligands and the coordinated modified nucleobases. Thus, depending upon the dimetallic complex several H-bonding interactions have been found in these series: (i) base pairing through Watson–Crick faces of adjacent dimetallic units, (ii) between a coordinated nucleobase and an oxygen atom from a carboxylic group of a neighboring molecule, and (iii) between a nucleobase and a solvent molecule. All these together with weaker π–π staking interactions define different 1D and 2D supramolecular assemblies. Interestingly, the magnetic studies show strong antiferromagnetic Cu···Cu interactions in agreement with the presence of four μ-κO:κO′ carboxylates bridging the metallic centers in each dinuclear complex. Finally, the crystal-to-crystal exchange reaction involving the ligands coordinated in the axial positions of the dimetallic [Cu2(OOCCH2-T)4(DMF)2]3[Cu2(OOCCH2-T)4(DMF)(H2O)]2 to the related 1D coordination polymer [Cu(OOCCH2-T)2(H2O)2] n has been confirmed in the presence of water vapor. This transformation implies a chemical stimuli magnetic response going from strong antiferromagnetic to almost paramagnetic, respectively.

show abstract

“…In opposite, the reaction between the homoleptic core compound 6 with the 2-Bzpy ligand yield the dimeric compound 7, keeping the paddlewheel building unit. It is worthwhile to mention that even though there are similar heteroleptic core previously described in the literature [6][7][8][9][10][11][12][13][14][15][16], there are few studies about their reactivity. In this juncture, besides presenting the first trial in this sense, it is also remarkable the different behaviour exhibited by the two paddle-wheel compounds (1,6).…”

Section: Discussionmentioning

confidence: 99%

“…Addition of acetic acid to the reaction media did not affect the reaction product (see experimental). As mentioned in the introduction section, there are few reported examples of Cu(II)-paddlewheel complexes with heteroleptic core and their reactivity has not been described [6][7][8][9][10][11][12][13][14][15][16]. Herein, we present the reactivity study of a heteroleptic core compound with N-donor ligands.…”

Section: Generalmentioning

confidence: 99%

“…There are>1400 crystal structures containing Cu(II) with a [Cu2L4] (L=R-COO) homoleptic core [5]. From those, only twelve present mixed bridged carboxylates [Cu(L)(L')(X)]2 [6][7][8][9][10][11][12][13][14][15][16] in which six structures are accomplished via acetate bridging units [8][9][10][11]13,14].There is not a rigorous explanation for its formation; steric hindrance could only play a significant role in three of them [11,13]. Recently, we have been studying the role of carboxylic acids in the structural arrangement.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Reactivity of homoleptic and heteroleptic core paddle wheel Cu(II) compounds

Sánchez-Férez

Guerrero

Ayllón

et al. 2019

Inorganica Chimica Acta

View full text Add to dashboard Cite

The compound [Cu(μ-Pip)(μ-OAc)(MeOH)]2 (1) (Pip=Piperonylate, OAc=acetate, MeOH=methanol) has been obtained in high percentage yield. Its reactivity with pyridine/pyrazole derivative ligands (pyridine (py), 3-phenylpyridine (3-Phpy) and 4-acetylpyridine (4-Acpy)) and 3,5-dimethylpyrazole (3,5-dmpz) leads to four monomeric compounds: [Cu(Pip)2(dPy)2(H2O)] (dPy=py (2), 3-Phpy (3) and 4-Acpy (4a)) and [Cu(Pip)2(3,5-dmpz)2] (5). Furthermore, the reaction of 1 with HPip in MeOH:DMF solvent under reflux conditions yields the homoleptic core paddle-wheel compound [Cu(μ-Pip)2(DMF)]2•2DMF (6). The reaction between 6 and 2-benzylpyridine (2-Bzpy) yields the paddlewheel core compound [Cu(Pip)2(2-Bzpy)]2 (7). All compounds have been fully characterized by analytical and spectroscopic techniques and their X-ray crystal structures have been determined. In this set of compounds, the carboxylate ligand (Pip) displays different coordination modes (monodentate (2-4), bidentate chelate (5) and bridged (1, 6 and 7)). Moreover, their extended structures are discussed: the crystal packing indicates hydrogen bond propagation, which defines 1D (2-5) or 2D (6 and 7) supramolecular networks...

show abstract

μ₂-Acetato-κ²O:O′-tris(μ₂-ferrocenecarboxylato-κ²O:O′)bis[(N,N-dimethylformamide-κO)copper(II)]

Cited by 5 publications

References 11 publications

Supramolecular architecture of metal–organic frameworks involving dinuclear copper paddle-wheel complexes

Supramolecular architecture of metal–organic frameworks involving dinuclear copper paddle-wheel complexes

Asymmetric and Symmetric Dicopper(II) Paddle-Wheel Units with Modified Nucleobases

Reactivity of homoleptic and heteroleptic core paddle wheel Cu(II) compounds

Contact Info

Product

Resources

About